In every operating room Windows system personal computer there are special tools that are responsible for an action or operation. But there is such a tool with which you can change errors and problems, as well as restore windows from command line.
If the OS boot fails, you need to use the help of the Bootrec.exe utility

With its help, problems are fixed in the computer, data is corrected, including loading windows or configuration files downloads.

Bootrec.exe - Help fixing Windows bootups

If you have problems starting your computer and find problems with it, you should use the method to fix Windows boot errors. It doesn’t matter which Windows is installed, the problem must be resolved so that you can continue to perform the tasks assigned to you.

When working with a tool like Bootrek.exe, they use commands for , but if the problem situation arose in the OS itself, the tool should be run inside it.

If this happened in Windows 7 version, you will need installation media or a disk that is capable of recovery boot sector hard drive. You can boot from USB or DVD discs, it depends on the OS version.

fig.1. When you see such a picture on the monitor, click on the highlighted function

Then you need to decide on the choice of the operating system that needs to be updated. This is a serious undertaking, as among many systems, only one requires fixing. Click the "Next" button to continue.

fig.2. A new window will open with recovery properties, but only the boot command line is needed here

If there is no disk for installing on Windows 7 or a disk responsible for restoring the boot sector, you will need access to the tools. They are using recovery hidden partitions. Windows 7 will be able to set them in automatic mode when the OS is installed.

Follow a certain sequence: need access to Recovery systems, Diagnostics, Advanced options and Command line

Writing new boot sectors

The bootrec function with the /FixBoot option will make it possible to write to the boot sector inside the system partition on hard drives. When performing this procedure, you need to use boot partitions, but only those that are compatible with Windows 7 and 8 versions.

These options can be used:

• If there are damages on the boot sectors, and their structure and size do not meet the requirements of the hard disk.
• When writing incompatible boot sectors with the Windows system.
• When the old Windows OS was installed in place of the new version.

In order to write a new boot sector, you need to run bootrec.exe as in the picture

Very often, the cause of a computer failure is damage to the boot sector or the master boot record.

However, you cannot start the computer in safe mode, or in Last Known Good Configuration mode. The computer may not give errors, or you will see the following entries on the screen:

NTLDR is missing. Press Ctrl+Alt+Del to restart,

Cannot start Windows due to corrupted or missing file: \WINDOWS\SYSTEM32\CONFIG\SYSTEM

How to restore the boot sector and boot record using the recovery console?

For Windows XP:

To do this, in the BIOS, select boot from a CD / DVD disk, or set the boot priority from a CD / DVD disk. The download of files will begin. After the download is complete, press R - start the recovery console.

In which a copy of Windows should you sign in?

1: C:\WINDOWS Which copy of Windows should I sign in to? Type 1, press Enter.

A message will appear:

**WARNING** This computer has a non-standard or invalid master boot record. Using FIXMBR can damage the existing partition table. This will result in the loss of access to all partitions of the current hard drive. If there are no disk access problems, it is recommended to abort the FIXMBR command. Are you confirming the writing of the new MBR?

Press: Y

The new master boot record will be written. Wait for the corresponding message.

Enter the FIXBOOT command.

The message appears: Destination Partition: C:. Do you want to write a new boot sector to the C: partition?

Press the Y button.

A message will appear: File system in boot partition: NTFS (or FAT32). The FIXBOOT command writes a new boot sector. The new boot sector has been successfully written.

Type exit to exit the console. Now, if this was indeed the problem, the computer will turn on without problems.

For Windows 7

For Windows 7, the commands are slightly different. Yes, and the console will also start differently.

How to restore the Windows 7 bootloader?

You will also need a disk with the Winows 7 operating system. We boot from the disk, as is the case with Windows XP.

After downloading the main files, a window for selecting language options will appear. At the bottom there will be a system restore button.

Click it and choose the option you want. In our case, the command line.

We also type the following commands. First

bootrec /fixboot (or bootrec.exe /fixboot)

bootrec /fixmbr (or bootrec.exe /fixboot)

We also press type exit to exit the console.

In the case of Windows 7, the Recovery Console can be started without a disc using Startup Repair. As a rule, the system itself will prompt you to run the recovery tool in case of a failure.

Note: If suddenly you see that the letter system disk in the recovery console is different from yours (that is, you know for sure that the OS was installed on drive D, and not on C, just enter the drive letter in the console. For example: D :)

We hope that you will be able to restore the OS. However, this method will not necessarily help you. Be careful. The authors of the site are not responsible for any damage caused to your PC.

The Windows 7 bootloader stops working for many reasons - if boot.ini is damaged or if you try to install XP along with the Seven, after which the latter does not want to boot. This is due to the fact that XP overwrites the Windows 7 MBR boot record. Usually, the Windows 7 bootloader is restored using standard system tools. You can also use another tool, such as Bootice.

The easiest way to restore the bootloader

If pressing F8 does not open additional startup methods and the troubleshooter, then you will need to use a Windows 7 recovery disc or flash drive. From this drive, you will need to boot the computer into the recovery environment by clicking on the system restore link at the bottom of the OS installation window.

1. The computer will automatically try to find a solution to the problem, which will notify you in the window that opens.
2. If the recovery utility is up to the task, all that remains is to reboot.

If restored Windows bootloader 7 after XP failed, use the startup repair tool, which, along with others, is part of the installation disk or flash drive. Usually, these simple methods can deal with simple MBR startup problems.

Edit boot.ini

Boot.ini is responsible for starting the system by default. At incorrect installation or removing one of the OS its entry in out of order will be stored in the same boot.ini. It is located at the root of the system partition, so to edit it, the computer must be configured to show hidden files.

Sometimes boot.ini can be corrupted by a virus or some program could contribute to it, after which the OS does not start on its own.

The fix is ​​simple - boot from the LiveCD and edit boot.ini with regular notepad. There are only two sections here - boot loader, which controls the boot and operating systems. You should remember the value of several parameters:

• timeout=10 - time in seconds during which the user can select an OS to run;
• multi(0) and disk(0) are parameters that must have zero values;
• rdisk(0) - disk number with the system partition (counted from zero).

In general, boot.ini from one OS should look like the one in the picture.

Using the command line to restore the MBR sector

You can get into command line mode from the same boot disk or flash drive by opening the system restore tool and selecting the most last paragraph"Command line".

1. Type the Bootrec command and then press Enter, it will appear full list opportunities
2. Write down the MBR sector, for which there is the Bootrec.exe /FixMbr command;
3. On the successful completion of the operation after pressing Enter, the computer will notify the user in the next line;
4. Next, carry out the procedure for writing a new boot sector, for which enter Bootrec.exe /FixBoot;
5. It remains only to enter Exit and try to restart the computer.

1. Enter the command line from the installation disk or flash drive;
2. Enter Bootrec /ScanOs, after which the utility will scan the computer for an operating system;
3. Write the Bootrec.exe /RebuildBcd command in the next line, the program will prompt you to add all found versions of Windows to the start menu, including XP, etc .;
4. It remains to agree with this by pressing Y and Enter in sequence, after which, when the system boots, you will have a choice of which OS to boot - XP or the seven.

You can fix the problem with the MBR with one more command. To do this, at the command line, enter bootsect /NT60 SYS, then Enter. Enter Exit to exit. As a result, the master boot code will be updated and your systems will appear in the list during boot.

In case of serious problems, it may not be possible to restore the MBR using the described methods, so you should try overwriting the files in the boot storage.

BOOTMGR is missing

The computer usually displays such a black screen message when the MBR sector is damaged or deleted. The reason may not be related to the MBR, for example, if the BIOS has lost the Boot tab settings and the system is trying to boot from the wrong disk. But more often it is the bootloader that is to blame, so we will describe how to restore Windows 7 boot.

On a disk with Windows 7 there is always a small 100-megabyte reserved hidden partition for writing OS boot files, including a damaged BOOTMGR. You can simply copy BOOTMGR from the installation media and write to this partition. For this:

1. Go to the command line from the recovery disk.
2. Enter the diskpart and list volume commands in sequence, after which a list of your disks and the letters that the system assigned to each of them will appear on the screen. We are interested in a 100 MB reserved partition and optical drive- disks C and F, respectively, as in the picture.
3. To exit, type Exit and press Enter.

Type the letter of the installation drive followed by a colon and the command to copy bootmrg to the reserved partition. It will look like this:

• F: and then Enter;
• copy bootmgr C:\ and press Enter;
• Exit, the utility will exit.

If copying to the hidden partition fails, the download store can be completely overwritten. Restoring the Windows 7 bootloader is done with the bcdboot.exe N:\Windows command, where N is the drive letter with the OS. After you are informed that the files were created successfully, you can exit the tool with the Exit command and restart your computer.

• write the diskpart line on the command line, which calls the utility;
• to list all available physical disks write list disk;
• is chosen desired disk sel disk 0 command, where 0 is the number of the only installed HDD;
• to display all partitions of the hard drive, enter list partition;
• to select a reserved partition, write the sel part 1 command, where 1 is the partition number;
• make it active by typing active;
• Exit the application by writing exit.

In extreme cases, you can completely manually delete and format the system partition by starting from some LiveCD, and then using the bcdboot.exe command to create the sector again.

Using Bootice

If Windows XP was installed after the "Seven", due to the overwritten MBR sector, only XP starts up and you do not have the opportunity to select a system after you turn on the computer. However, both systems are fully operational, and you can return the start menu very easily, for which the Bootice utility is used:

In the new Bootice window on the left you will see the OS boot list, in which you will need to add the missing "Seven" to Windows XP:

• click "Add";
• in the list that opens, select the line new record Windows 7;
• on the right side in the upper input field, select the hard drive;
• in the field below, indicate the section with the "Seven";
• click on save basic settings.

The program will notify you about the successful change of this element in Boot and you can exit Bootice. The next time you turn on your computer, you can already choose which OS to boot from your hard drive - Windows 7 or XP.

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The windows 7 bootloader stops working for many reasons - if boot.ini is damaged or if you try to install XP along with the Seven, after which the latter does not want to boot. This is due to the fact that XP overwrites the windows 7 MBR boot record. Usually, the windows 7 bootloader is restored using standard system tools. You can also use another tool, such as Bootice.

The easiest way to restore the bootloader

If pressing F8 does not open additional startup methods and a troubleshooter, then you will need to use a disk or flash drive windows recovery 7. From this drive, you will need to boot your computer into the recovery environment by clicking on the system recovery link at the bottom of the OS installation window.

1. The computer will automatically try to find a solution to the problem, which will notify you in the window that opens.
2. If the recovery utility is up to the task, all that remains is to reboot.

If it was not possible to restore the windows 7 bootloader after XP, use the startup repair tool, which, along with others, is part of the installation disk or flash drive. Usually, these simple methods can deal with simple MBR startup problems.

Edit boot.ini

Boot.ini is responsible for starting the system by default. If one of the OSes is installed or removed incorrectly, its non-working record will be stored in the same boot.ini. It is located at the root of the system partition, so to edit it, the computer must be configured to show hidden files.

Sometimes boot.ini can be corrupted by a virus or some program could contribute to it, after which the OS does not start on its own.

The fix is ​​simple - boot from the LiveCD and edit boot.ini with regular notepad. There are only two sections here - boot loader, which controls the boot and operating systems. You should remember the value of several parameters:

• timeout=10 - time in seconds during which the user can select an OS to run;
• multi(0) and disk(0) are parameters that must have zero values;
• rdisk(0) - disk number with the system partition (counted from zero).

In general, boot.ini from one OS should look like the one in the picture.

Using the command line to restore the MBR sector

You can get into command line mode from the same boot disk or flash drive by opening the system restore tool and selecting the very last item "Command line".

1. Type the Bootrec command and then press Enter, a complete list of features will appear;
2. Write down the MBR sector, for which there is the Bootrec.exe /FixMbr command;
3. On the successful completion of the operation after pressing Enter, the computer will notify the user in the next line;
4. Next, carry out the procedure for writing a new boot sector, for which enter Bootrec.exe /FixBoot;
5. It remains only to enter Exit and try to restart the computer.

1. Enter the command line from the installation disk or flash drive;
2. Enter Bootrec /ScanOs, after which the utility will scan the computer for an operating system;
3. Write the Bootrec.exe /RebuildBcd command in the next line, the program will prompt you to add all found versions of windows to the start menu, including XP, etc .;
4. It remains to agree with this by pressing Y and Enter in sequence, after which, when the system boots, you will have a choice of which OS to boot - XP or the seven.

You can fix the problem with the MBR with one more command. To do this, at the command line, enter bootsect /NT60 SYS, then Enter. Enter Exit to exit. As a result, the master boot code will be updated and your systems will appear in the list during boot.

In case of serious problems, it may not be possible to restore the MBR using the described methods, so you should try overwriting the files in the boot storage.

BOOTMGR is missing

The computer usually displays such a black screen message when the MBR sector is damaged or deleted. The reason may not be related to the MBR, for example, if the BIOS has lost the Boot tab settings and the system is trying to boot from the wrong disk. But more often it is the bootloader that is to blame, so we will describe how to restore windows 7 boot.

On a disk with windows 7 there is always a small 100-megabyte reserved hidden partition for writing OS boot files, including a damaged BOOTMGR. You can simply copy BOOTMGR from the installation media and write to this partition. For this:

1. Go to the command line from the recovery disk.
2. Enter the diskpart and list volume commands in sequence, after which a list of your disks and the letters that the system assigned to each of them will appear on the screen. We are interested in a 100 MB reserved partition and an optical drive - drives C and F, respectively, as in the picture.
3. To exit, type Exit and press Enter.

Type the letter of the installation drive followed by a colon and the command to copy bootmrg to the reserved partition. It will look like this:

• F: and then Enter;
• copy bootmgr C:\ and press Enter;
• Exit, the utility will exit.

If copying to the hidden partition fails, the download store can be completely overwritten. Restoring the windows 7 bootloader is done with the bcdboot.exe N:\windows command, where N is the drive letter with the OS. After you are informed that the files were created successfully, you can exit the tool with the Exit command and restart your computer.

• write the diskpart line on the command line, which calls the utility;
• to list all available physical disks write list disk;
• the required disk is selected with the sel disk 0 command, where 0 is the number of the only installed HDD;
• to display all partitions of the hard drive, enter list partition;
• to select a reserved partition, write the sel part 1 command, where 1 is the partition number;
• make it active by typing active;
• Exit the application by writing exit.

In extreme cases, you can completely manually delete and format the system partition by starting from some LiveCD, and then using the bcdboot.exe command to create the sector again.

Using Bootice

If windows XP was installed after the "Seven", due to the overwritten MBR sector, only XP starts up and you do not have the opportunity to select a system after you turn on the computer. However, both systems are fully operational, and you can return the start menu very easily, for which the Bootice utility is used:

In the new Bootice window on the left you will see the OS boot list, in which you will need to add the missing "Seven" to windows XP:

• click "Add";
• in the list that opens, select the new line windows records 7;
• on the right side in the upper input field, select the hard drive;
• in the field below, indicate the section with the "Seven";
• click on save basic settings.

The program will notify you about the successful change of this element in Boot and you can exit Bootice. The next time you turn on the computer, it will already be possible to choose which OS to boot from the hard drive - windows 7 or XP.

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Windows 7 Boot Recovery

Friends, many of you have had problems loading the operating system more than once and you asked the question of how to restore windows 7 boot and make sure that operating system loaded fine. In this article, we will look at the most common ways to restore the windows 7 bootloader, which help in most cases.

Boot from the installation disk or flash drive from your windows version 7.

If you do not have a suitable flash drive, then it would be time to get one already.

The main thing is that the bitness of the system matches (32-bit or 64-bit). Also, it is desirable that the release coincides (Home, Professional, Ultimate).

Instead of installing, choose System Restore.

Go to the "System Recovery Options" window and select the "Startup Repair" restore tool.

After that, the recovery program will search for errors in the boot sector and boot windows section 7 and will try to fix them if found. After that, you will need to reboot the system and perhaps windows 7 will boot normally.

If the first time it was not possible to restore the download using the windows 7 recovery tool, then try repeating this process 1-2 more times. This often helps, as the repair tool can't always fix multiple issues in one pass.

2. Restore windows 7 boot using command line

If you were unable to restore windows 7 boot using the automatic repair tool, then try to do it using the command line, it's simple. If your computer is not running as fast as you would like, install SSD disk and you will get a significant performance boost! ASP900S3 75E120BW F120GBLSB

Boot from the installation disk or flash drive with your version of windows 7 and select "System Restore" instead of installing.

Go to the "System Recovery Options" window and select the "Command Prompt" recovery tool.

After that, a window with a black background will appear in which you will need to write several commands.

Enter the following commands in turn:

bootrec /fixmbr

bootrec /fixboot

bootsect /nt60 ALL /force /mbr

exit

Switching the language is done by pressing Alt+Shift. After entering each command (line), you need to press the "Enter" key.

Then restart your computer.

After that, in most cases, the problems associated with the boot sector and the windows 7 bootloader will disappear and the operating system will boot normally.

If after using the command line, windows 7 still does not load, then try again using automatic means boot recovery, as we discussed above.

3. Windows 7 boot recovery with system reinstallation

If you were unable to restore the boot of the operating system using the methods described above, then most likely you will have to reinstall windows 7 with deleting partitions.

Before reinstalling windows 7, copy all the files that are important to you from your hard drive to external drive or flash drive. This can be done using any bootable LiveCD. Please note that an external drive or flash drive must be connected to the PC before booting from the LiveCD, otherwise it may not be detected.

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If, due to boot errors, you are unable to reinstall windows 7, then delete all partitions from the disk using a third-party utility, such as the Acronis Disk Director boot disk. After that, try again to install windows 7 with the creation of new partitions.

If at reinstall windows 7 at the disk setup stage (creating partitions, choosing a partition for installation) or when you restart the computer during the installation process, you will encounter the same boot errors, then launch the command line and run the commands that we discussed above.

The command line at the disk setup stage can be launched using the Shift + F10 key combination.

If you have other problems with the installation:

• windows does not see the disk
• Can't install windows to this drive
• Selected disk has GPT partition style

read our articles on installing windows 7, windows 8.1 and windows 10. There are also tips on partitioning a disk and the nuances of installing windows on large disks (3 TB or more).

4. Causes of problems with loading windows

Most common causes windows boot failures are:

1. Crashes in work hard disk and power supply
2. Errors when installing multiple operating systems
3. Usage Errors disk utilities
4. Incorrect activators
5. Installing windows on an existing partition with a bootloader

In order to prevent problems with loading in the future, you need to determine what exactly led to the problem and not repeat these errors.

If you have found another reason that caused the problem with loading windows, or another way to fix the problem, please write about it in the comments.

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How to restore windows 7 startup via command line

Repair Tools windows errors constantly improving, offering users more and more automated solutions to quickly resolve various problems. If you connect the installation media to your computer and select Startup Repair in the System Restore section, you can fix many errors that interfere with windows startup. However, if the bootloader is damaged, this method will not work, so if you encounter such a problem, you will have to MBR recovery via command line.

Command line launch

You will need boot disk with the distribution kit of the same system that is installed on the computer. Not only the version must match, but also the bit depth of Windows, otherwise the recovery will not work.

After opening the list of available tools, first fix launch errors. If you can't resolve the bootloader corruption issue, return to the list of tools again and select Command Prompt.

Bootrec utility

To overwrite the MBR (data required to boot Windows) and fix bootloader errors, we will use the built-in windows utility. Enter the command "bootrec" in the interpreter window. After running this utility, a list of supported commands will appear - run them in order.

Restart your computer. The bootloader repair is done, the MBR is overwritten, so Windows should start without problems. If overwriting the MBR did not resolve the startup issue, try the remaining two commands:

The utility will start scan hard drive, trying to find installed systems. When windows 7 is detected, run "Bootrec.exe /RebuildBcd". The systems found will be written to the boot menu. Exit the utility using the "exit" command and restart your computer. You no longer need to overwrite the MBR - Windows will start without errors.

BCDboot utility

If you can't fix the MBR error, try repairing the bootloader using the BCDboot utility. This tool allows you to create or restore a boot environment located in active section hard drive. If, as a result of a system failure, the boot environment was moved to another partition of the hard disk, then using BCDboot.exe you will return it to its place.

Open a command prompt and type "bcdboot.exe e:\windows" (attributes are optional). Instead of "E:" you need to put the letter of the partition on which the Windows files. If in windows environment this section is marked with the letter "C", then here it can be displayed as "D" - keep this in mind when executing the command.

After the operation is completed, restart your computer and try to start windows again. The corrupted boot environment will be repaired and the system will start without errors.

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How to restore bootloader windows 7 and windows 8

What is windows bootloader? In the simplest language, this is a program that ensures that the operating system is loaded immediately after turning on the computer. If we consider the evolution of windows operating systems, then in windows 2000 and windows XP, the windows loader was NTLDR (NT Loader), which can load other operating systems by setting the appropriate boot sector in a separate file. But with the advent of a new system BIOS- EFI and UEFI - the old NTLDR was no longer compliant. Beginning with windows vista and further, in windows 7, windows 8 and windows 8.1, a new boot manager (boot manager) - BOOTMGR began to be used. Its work is closely related to the Master Boot Record (MBR) or the Master Boot Sector (MBS). When the computer boots, after checking the hardware, the BIOS reads the first sector - 512 bytes of data - from the boot hard disk. An MBR can take up more than one sector, but that's not the point here. The MBR contains the code for the primary bootloader and the hard disk partition table.

In case of damage to the bootloader or boot record, your operating system - be it windows 7, windows 8 or windows 8.1 - will give the BOOTMGR is missing - press CTRL+ATL+DEL to restart error.

In some cases, the error BOOTMGR is corrupt is given. The system cannot boot:

In this case, you will no longer be able to start the windows operating system in normal mode.

Note: First of all, before resorting to drastic actions, check if the boot sequence is simply set incorrectly hard drives, or the BIOS settings were simply reset to default (this happens when the CR2032 battery runs out on motherboard). This is especially common on computers with 2 or more hard drives installed. You only need to go to Computer BIOS and check which one is loaded. To do this, when loading, when the primary diagnostics of the hardware is in progress (white letters on a black background), press the Delete button several times. The BIOS screen should open. We are looking for the item “Hard Disk Boot Priority” or simply “Boot Device Priority” in the BIOS sections and select it:

Before you change something, you need to know on which of the disks the operating system is installed. If you do not know - put each of the hard drives in turn first, press the F10 button to save and try to boot. The main thing is to remember which disk was first at first and, if the sequence change does not bring results, return everything as it was.

How to restore windows bootloader.

There are two recovery methods: using standard means from Microsoft and with the help third party programs. In the first option, you will need a boot disk or USB flash drive with the original way windows 7 or windows 8. Third party windows assembly may not be suitable, since on many assemblies everything starts immediately from the beginning of the installation of the operating system. In the case of using third-party programs, the Hiren's Boot CD is suitable for you.

Restoring the bootloader using Microsoft tools.

Method for windows 8 and windows 8.1

Step 1. We restart the computer, at boot press the Delete button and get into the BIOS. In the “Boot Device Priority” section, you must set the CDROM value in the case of a disk or USB in the case of using bootable flash drive.

Step 2. When booting from the disk, the Install windows window should open:

At the very bottom, select "System Restore". The hard drives will be checked and a list of available operating systems will be displayed. Often there is one item on the list, and you need to select it:

The Select Action window opens:

Click on the "Diagnostics" icon - the section menu will open:

Select the item "Advanced options".

Step 3. Select the item "Automatic recovery":

The system diagnostics will start. If any error is found, you will be shown a message about it. Then you will need to click the Fix button and wait for the fix to finish and restart the computer.

Step 4. In case automatic recovery didn’t reveal any problems during diagnostics or didn’t help and at startup anyway windows 8 doesn’t load and the error “Bootmgr is Missing” appears, then we boot from the disk again and in the section “ Additional options"Diagnosis" select the item "Command line":

The windows 8 or windows 8.1 command prompt will open.

Step 5. In the Command windows line 8 enter the command: bootrec.exe / FixMbr Press Enter. The "/FixMbr" key is used to write to the system partition a master boot record that is compatible with windows 8 and windows 8.1. This option does not overwrite the existing partition table. Then we enter the command:

bootrec.exe /FixBoot

And press Enter again.

The "/FixBoot" key is used to write a new boot sector to the system partition using a boot sector compatible with windows 8 and windows 8.1.

We restart the computer and check the loading of windows 8.

Step 6. If after rebooting the error “BOOTMGR is missing - Press Ctrl+Alt+Del to restart” has not been resolved, run the command line again, where we type the command bootrec.exe /RebuildBcd The “/RebuildBcd” key is used to completely rebuild the configuration data. The result of executing the program with this key will be scanning the hard disk for the presence of an operating system. windows systems and a request to add it to the download list.

Click - Yes (Y) and restart the computer and check.

After the above operations, it is usually possible to restore the windows 8 and windows 8.1 bootloader. If the above methods did not help, then you need to try to restore the download using third-party programs. And if they don’t help either, reinstall windows 8, since most likely nothing else will help.

Method for windows 7.

Step 1. We restart the computer, at boot press the Delete button and get into the BIOS. In the “Boot Device Priority” section, you must set the value to “CDROM” in the case of a disk or USB in the case of using a bootable flash drive.

Need parameter "1st boot device» Set the value to "CDROM" (or USB-HDD for a flash drive). Press F10 to save the BIOS configuration. We restart the computer.

Step 2. When booting from a disk, you will see the following window to start installing windows 7:

Here you need to select the item "System Restore". After checking the hard drives, you will be shown a list of available operating systems:

As a rule, there is only one system in the list, although there are users who have 2, 3 or even more operating systems on the screw. But this is less common. Click the Next button and the System Recovery Options window opens.

Step 3. Select the item "Startup Repair". The system will be diagnosed. If an error is found, you will see a message:

You will need to click the "Fix and restart" button. After that, the system should boot in normal mode.

Step 4. If, after a reboot, the normal loading of windows 7 has not been restored or no problems have been identified during system diagnostics:

Then you need to select the "Command Prompt" item in the "Recovery Options" window of the system:

Step 5. In the windows command line, enter the bootrec.exe /FixMbr command and press Enter. Then we enter the bootrec.exe /FixBoot command and press Enter. I already wrote about what the /FixMbr and /FixBoot keys mean above.

We restart the computer and check.

Step 6. If, after restarting the computer, the bootloader did not recover and the BOOTMGR is missing error did not disappear, start the command line again and type the command: bootrec.exe /RebuildBcd

The "/RebuildBcd" switch searches for installed operating systems that are compatible with windows 7 and will perform a complete rebuild of the boot configuration data. The result of the program will be scanning the hard disk for the presence of the windows operating system and a request to add it to the boot list. Press - Yes (Y) and restart the computer.

Step 7. If the windows 7 boot error has not been resolved, then there is another way from Microsoft - the BCDBoot utility, which is used to create a system partition or restore the boot environment located in system partition. On the command line, you need to type the command:

bcdboot.exe c:\windows (If you have windows installed on another drive, correct the path in the command, for example, to d:\windows).

The result will be the message "Boot file successfully created". We restart the computer and check.

Restoring windows to boot normally with Hiren's Boot CD.

Unfortunately, there is not always an original boot windows disk 7 or windows 8 is at hand, and downloading it from the Internet can be very problematic. In this case, various small boot assemblies usually come to the rescue - the so-called liveCD, which can also be written to a disk or USB flash drive. In my opinion, the most optimal, convenient and easy service set of programs for restoring the windows 7 or windows 8 operating system is Hiren's Boot CD. There are a lot of utilities for restoring the windows bootloader on the disk, so I will show those that are most often used system administrators: graphics program"Paragon Hard Disk Manager" and console utility "MBRfix". First you need to download "Hiren's Boot CD", burn it to a USB flash drive or CD and put it in BIOS boot from CDROM or USB-HDD, depending on whether you are booting from a disk or USB flash drive.

If everything is done correctly, you will see the Hiren's Boot CD start menu:

Option 1. Paragon Hard Disk Manager.

To launch the program "Paragon Hard Disk Manager" you need to select the item "DOS programs" or "Run DOS programs (alternative method)", and then the subsection "Disk Partition Tools" and, accordingly, the item "Paragon Hard Disk Manager" .

Now you need to select the menu item "Wizards" \u003d\u003e "Windows Boot Recovery" in the main program window:

The "Windows Boot Recovery" menu will open:

Select the first item - "Search for installed copies of windows" and click the Next button.

The program scans disks and displays a list of operating systems, which usually has only one item. Check the box "Change boot record” and click the Next button.

Paragon Hard Disk Manager will overwrite the boot record (MBR). Click the Finish button and restart your computer.

Option 2. MBRFix utility.

To run the MBRFix utility, you need to start menu Hiren's Boot CD select "Mini windows XP". After the operating system boots up, you must click the "Start" button => "HBCD Menu".

In the HBCD menu that opens, select "Partition/Boot/MBR" => "Commandline" => "MBRFix":

To restore the windows boot record (MBR) and the windows bootloader on the C:\ drive for windows 7, the command parameters should be: MBRFix.exe /drive 0 fixmbr /win7 /yes. To view disk information, you can enter the command:

MBRFix.exe /drive 0 driveinfo.

I have not yet tested this utility on windows 8 and windows 8.1, so I cannot recommend it.

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Master Boot Record (MBR) recovery in windows 7

After the channel "Video Tips" was told about easy way installing two or more operating systems on one computer, reasonable questions arose about what would happen if the second system got tired and there was a desire to remove it. Most likely, the bootloader will fly off (in the language of motorists, it's like a starter in a car) and you will see a black screen. Many may think "well, that's it, the computer has broken down again." In fact, the system is installed and fully functional, but it cannot start.

It can also happen if systems are installed on the computer in a chaotic manner and the correct installation order is not followed: (C:) windows XP, (D:) windows 7, (E:) windows 8.1 (F:) windows 10.

In a word, the "loader" can "fly" for various and more exotic reasons, but you should not be afraid of this.

• The Master Boot Record (MBR) is the first sector on the hard disk, which contains the partition table and a small loader program that reads data in this table from which partition of the hard disk the system boots and then the information is transferred to the partition with the installed operating system, for downloading it (something like that 🙂).

Today the conversation will be about windows 7 (although the steps to restore the "bootloader" in other systems are the same). To do this, you need either an installation disk with the operating system, I hope you haven’t thrown it away yet, or a flash drive (if you don’t have either, read the article below). We turn on the computer. Press the button responsible for entering boot menu and set the boot priority from the drive or from the USB drive. Let's imagine that we are loading from optical disc. An inscription appears during the download.

1. Press any key to boot from CD or DVD. We reach the "Install windows" window and click the "System Restore" button.

Probably problems will be detected immediately. Click the "Fix and restart" button.

2. If it doesn’t help and the system still does not boot, we again reach the “System Recovery Options” window and click the “Next” button.

Select "Command Prompt".

Enter the first bootrec /fixmbr command

• The utility writes a windows 7 compatible Master Boot Record (MBR) to the system partition. This option will solve problems associated with damage to the master boot record, or if desired, remove non-standard code from it. The existing partition table is not overwritten in this case.

The second bootrec /fixboot command

• The utility writes a new boot sector compatible with windows 7 to the system partition.

We exit by writing exit and reboot the computer.

3. In principle, these actions should "cure" the computer. But there are still commands if the dark clouds continue to gather overhead. We enter the bootrec /ScanOs command, the hard drive is scanned for operating systems, and if any are found, an appropriate warning will be issued. Then command bootrec /RebuildBcd, this utility will offer to add the found windows to the boot menu, agree and enter Y and press Enter. windows was successfully added to the boot menu.

4. In addition to the methods described, you can use the bootsect /NT60 SYS command, the main boot code will also be updated. Then exit and reboot.

5. If nothing further helps (although it is hard to believe), we restore the boot environment using the BCDBoot.exe utility, it is used to create a system partition or restore the boot environment located in the system partition. The command line looks like this: bcdboot c:\windows If your system is installed on another partition, you need to correct the path in the command, for example, to bcdboot e:\windows

Thus, we have successfully restored the "bootloader" in windows 7 and there is no need to drag the computer to the workshop. What if there is no installation disk or flash drive. Download at least this program in advance. Upload it to a disc or USB drive. By the way, remember we already had a post on how to create a multiboot flash drive. When it happens to see a black screen, we remember this program, there are a lot of interesting things, including the cmd.exe command line interpreter.

This is probably enough, although the inability to start the windows 7 operating system due to a damaged or missing bootloader can be solved using programs such as Hiren's Boot CD, Paragon Hard Disk Manager, MBRFix and many other useful gizmos 🙂.

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Sometimes it happens that because of the curvature, or viruses on the computer, the boot sectors and, of course, the OS can fly off winxp not boots, giving a system message that the bootloader is corrupted Windows, or corrupted registry Windows, or damaged system files, or even worse, nothing is loaded except for the virus information prescribed by the virus in your boot sector. With all this, it is not possible to go to the restore point, nor load the last successful config, nor boot into safe mode. In most cases, users immediately try to reinstall Windows, although, as a rule, you can restore it to working capacity in 5-10 minutes using the so-called recovery console.

First you need to have a boot disk / flash drive with the installation package Windows XP Pro.
1. Then go into the BIOS (when you turn on the computer, press at intervals of half a second F2 or Del or F10- depending on the manufacturer of the motherboard)
2. AT BIOS install primary boot from CD-ROMs/Flash drives, put the disk in the sdrom or, respectively, the USB flash drive in the USB connector. Reboot.
3. When the installer Windows XP upload your files to RAM PC, the Install Windows XP Professional", containing the selection menu from which we are interested in the item

To restore Windows XP using the recovery console, click R

Click R. The recovery console will load. If there is only one operating system installed on the computer, and it is (by default) installed on the C: drive, the following message will appear:

1:C:\WINDOWS
Which copy of Windows should I sign in to?

Enter 1, press Enter
A message will appear:

Enter administrator password:

Enter password, click Enter(if the password is empty, just click Enter).

The system prompt will appear:

Enter fixboot

A message will appear:

Destination partition: C:.
Do you want to write a new boot sector to the C: partition?

Enter y(which means 'yes').

A message will appear:

File system on boot partition: NTFS(or FAT32).
Team FIXBOOT writes a new boot sector.
The new boot sector has been successfully written.

At the system prompt that appears C:\WINDOWS>
enter fixmbr

A message will appear:

**WARNING**
This computer has a non-standard or invalid master boot record. Using FIXMBR can damage the existing partition table. This will result in the loss of access to all partitions of the current hard drive.
If there are no disk access problems, it is recommended to abort the command FIXMBR.
Confirm the entry of a new MBR?

Enter y(which means 'yes').

A message will appear:

A new master boot record is produced on physical disk\Device\Harddisk0\Partition0.
The new master boot record has been successfully created.

At the system prompt C:\WINDOWS>
enter , sign in BIOS Setup and put the primary boot from the hard drive or just remove all bootable CDs from the computer.

In 95% of cases, it is possible to restore working capacity in this way. OS Windows XP.

NOTES:
1. If you don't know what is Registry Windows and the recovery console, in such critical situations - in order to avoid worsening the situation! - do not try to fix everything yourself - it is better to seek help from specialists.

2. If more than one OS is installed on your PC, do not use the recommendations of this article - immediately contact the specialists!

3. The recommendations of this article are NOT a panacea! IT IS POSSIBLE (but whether it is necessary, decide for yourself!) to use them when it is impossible to go to the system restore point, or load the last known good configuration (the PC does not boot even in safe mode), and you are already about to reinstall the OS.