MBR stands for Master Boot Record. It’s that sector of the hard disk which contains all the information of the partitions. It also acts as a loader for Windows operating system. If it is damaged then you will get error messages and cannot boot.

Some Common Error Messages:

  • Error loading operating system
  • Operating System not found
  • Invalid partition table
  • No bootable medium found
  • Reboot and select proper boot device

There may be other error messages also.

How to Fix:

To fix you need original Windows 10 Recovery media. If it is not available then you may download Windows 10 ISO and make a bootable USB.

  • Boot with USB media.
  • Select Repair your computer.
  • Choose Troubleshoot > Advanced options > Command prompt
  • In Command prompt write the following commands and hit Enter key after each command:

bootrec /FixMbr

bootrec /FixBoot

bootrec /ScanOs

bootrec /RebuildBcd

  • Remove USB drive or DVD.
  • Type exit and hit Enter key.
  • Reboot.

Related Resources: