How To Repair Master Boot Record (MBR) On Windows 10
Master Boot Record (MBR) most important file of the windows operating system. that information enables your PC to find the location of the operating system to allow Windows 10 to boot. Due to some system reconfiguration and your computer doesn’t shut down properly that causes the Master Boot Record to get corrupted, and sometimes, you may even come across the Bootmgr Is Missing error message that will prevent the computer from booting. If you ever found that problem, you will need to fix the MBR to enable Windows 10 to load again using a bootable installation media and Command Prompt. if you want to resolve that issue use the following steps.
1. First, create a Windows 10 cd drive and bootable media.
2. Change the BIOS settings to boot from the bootable media.
3. When starting the PC with the bootable media.
4. Click the Next button in the Windows 10 Setup.
5. Click on Repair.
6. Click on Troubleshoot button.
7. Click on Advanced options button.
8. Click on Command Prompt button.
9. When command prompt open type command step by Step bootrec /FixMbr and Press enter
bootrec /FixBoot press enter
bootrec /ScanOs Press enter
bootrec /RebuildBcd and press enter
10. Now remove your bootable drive
11. Type exit and press enter
12 Now restart your computer and check if Windows 10 can now boot.
After run bootrec utility doesn’t fix your Windows 10 installation, use the following commands to fix the EFI bootloader
1. Boot your computer with the bootable media.
2. Click the Next button in the Windows 10 Setup.
3. Click the Repair.
4. Click the Troubleshoot button.
5. Click the Advanced options button.
6. Click the Command Prompt button.
7. When command prompt open type diskpart sel disk 0 list vol and press enter. These commands will select the first disk drive of your computer and the list all the partitions available on that disk.
8. Check for the volume if volume number is 2 type sel vol 2 press enter
9. Now assign a letter to this partition type assign letter=x: and press enter
10. Now DiskPart successfully assigned the drive letter or mount point message to appear.
11. Type Exit
12. Type cd /d x:\EFI\Microsoft\Boot\ and press enter
13. Type bootrec /fixboot and press enter
14. Type ren BCD BCD.backup press enter
15. Type bcdboot c:\Windows /l en-us /s x: /f ALL and press enter
16. type exit and restart the computer
Resolve Bootmgr Is Missing Issue
For Resolve, Bootmgr Is Missing Issue issue
1. First, create a Windows 10 cd drive and bootable media.
2. Change the BIOS settings to boot from the bootable media.
3. When starting the PC with the bootable media.
4. Click the Next button in the Windows 10 Setup.
5. Click on Repair.
6. Click on Troubleshoot button.
7. Click on Advanced options button.
8. Type BCDedit /export C:\BCD_Backup press enter
9. Type C: press enter
10. Type CD boot press enter
11. Type Attrib BCD -s -h -r press enter
12. Type Ren C:\boot\bcd bcd.old press enter
13. Type Bootrec /RebuildBcd press enter
14. Press Y to confirm adding Windows 10 to the list of bootable operating system on your computer.
14. Now restart your computer and check if Windows 10 can now boot.
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