You will get several error messages at startup, such as. B. Operating system not found, missing bootmgr, boot item not found, operating system boot error, missing operating system or invalid partition table. All these error codes are symptoms of a Master Boot Record error. The MBR (Master Boot Record) may be missing or damaged on a Windows 10, 8.1 and 7 computer. In this post, we will discuss what MBR is and how to restore Master Boot Record (MBR) in Windows 10 to solve Windows boot issues.

What is an MBR (Master Boot Record)?

The MBR (Master Boot Record) contains information about the partitions of the hard disk. This allows your PC to find and locate the operating system so that Windows 10 can boot up properly. For whatever reason, like. B. Virus/malware infection, crashing, data corruption and other reasons. If your computer’s MBR (Master Boot Record) is damaged or missing, you will not be able to get past the BIOS boot screen and will get error messages saying no boot information found, operating system not found, bootmgr missing, bootrec item not found, etc.

Restore Master Boot Record

If the MBR is damaged, you will not be able to start Windows. Most people think of reinstalling the operating system to solve this kind of problem. But here you don’t need to repair the MBR and restore/rebuild the Master Boot Record (MBR) in Windows 10.

If we cannot boot Windows normally because of the missing MBR, then for this reason we need to access additional options where we can access the extended command line to repair/rebuild the Master Boot Record (MBR).

  • First insert the bootable Windows media into the problem PC.
  • If you don’t have one, download the latest Windows 10 ISO and create a bootable USB/DVD drive following the instructions here).
  • Restart the computer and press ESC or Del key ( Some PCs support F12, F2) to access the BIOS settings.
  • Next, change the boot order to boot your computer with bootable media to begin installing Windows 10.
  • Press any key to boot from the installation media, skip the first screen.
  • And on the next screen, click on the Restore Computer button in the lower left corner.

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  • Then click Troubleshooting, Advanced Options, and then Command Prompt to open the Advanced Command Prompt and repair the MBR.

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Now run the following command to repair the MBR and restart the computer normally.

MBR (Master Boot Record) Repair

If you are on the extended command line, you can use it to run the Bootrec.exe utility to restore the Master Boot Record on your Windows 10 computer. Bootrec.exe supports a number of options, depending on your situation. Therefore, first use the fixmbr command with the bootrec tool to repair a damaged or corrupted MBR.

bootrec /fixmbr

After the order is completed, you will receive a confirmation message indicating that the operation was successful.

If you suspect that your boot sector is corrupt or has been replaced by another boot loader, use the following command to erase the existing sector and create a new boot sector.

bootrec /fixboot

In addition to corrupted boot records, boot record errors can also occur if the boot configuration data is damaged or corrupted. In these cases, use the following command to restore the boot configuration data. If the BCD is truly corrupt or damaged, Windows displays the identified Windows facilities to restore the full BCD.

bootrec /rebuildbcd

If you have more than one operating system installed on your Windows computer, you can use the ScanOS argument. This option instructs Windows to scan for missing operating systems and add them to the boot configuration data. This allows the user to choose the operating system at startup.

bootrec /scanos

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Then type exit to close the command line and restart the window. You can now restart your Windows PC without any problems.

Eliminate a missed bootleg

If you are trying to resolve the Bootmgr Is Missing error and rebuilding the BCD memory does not solve the problem, you can use the following commands to export and clear the BCD memory and try again to force Windows 10 to boot using the RebuildBcd command.

To do it again, open the command line in the Advanced Options menu and run the following commands, pressing the Enter key on each line:

  • BCDedit /export C:BCD_Backup
  • C :
  • Download the CD
  • BCD attribute -s -h -r
  • Run C:bootbcd bcd.old
  • Bootrec /RebuildBcd

Press Y to confirm that Windows 10 has been added to the list of bootable operating systems on your computer.

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After running these commands, restart Windows and check that the initial repair is no longer in progress. And your system will be able to boot Windows 10 without any boot error.

Yes, it is also easy to repair MBR in Windows 10. Please comment below if you encounter any problems when running the above commands to resolve the boot record errors. Besides, the reading

frequently asked questions

What happens if the MBR is damaged?

Your computer will not work if the Windows MBR is damaged or deleted. … The master boot disk is an important part of your PC’s boot system. It contains information about the partitions on your computer’s hard drive and helps you start your operating system. Without a working MBR, your computer just won’t work.

Does the system repair the MBR?

This loads the System Restore options, which contain many tools you can use to restore Windows, such as B. System Restore. However, to restore the MBR in this case, you only need to go to the fifth option, which is to open the command line. This command finds your MBR file and repairs your Master Boot Record.

How do I know that my MBR is corrupt?

If the drive doesn’t boot, there’s a problem with the MBR or it doesn’t exist, so that’s your control. However, the bootrec.exe /ScanOs command should show a list of active MBR entries. If they are not there, then they have either disappeared or changed.