MBR Repair:
-----------

Win XP, Vists, 7, 8: MBR  
- (Safe-Mode=F8)
Win 10: MBR or GPT  
- (Safe-Mode=hold down Shift on your keyboard. While keeping Shift pressed, click the Power button and select Restart)
Windows 11: GPT using UEFI Bios  
- (Safe-Mode=hold down Shift on your keyboard. While keeping Shift pressed, click the Power button and select Restart)


How to tell your hard drive MBR is damaged? 

What's the sign of hard drive MBR is damaged? Except the apparent error message shows you that 
master boot record is damaged, your computer may show some of the following errors: 

Errors:
The "Error loading operating system" error 
The "Operating system not found" error 
The "Invalid partition table" error 
The "No bootable medium found" error 
The "Reboot and Select proper boot device" error 


NOTE: 
If you have: AOMEI Partition Assistant Standard, you can create a Windows-PE Disk so you can Rebuild the MBR's. 


Boot up using Windows 10 / Windows 11 Disk.


After 1st screen, click on Repair Your Computer / Troubleshoot / Command Prompt

Will show: X:\windows\system32>

Type in Order at the Command Prompt:
bootrec /fixmbr.
bootrec /fixboot.
bootrec /scanos.
bootrec /rebuildbcd.

------------------------------------------------------------------

MBR Repair:
-----------

Windows XP, Vista, 7, 8, 10


Fix:
----

1. Boot from the Win-PE EaseUS Emergency Disk.

2. In the main windows of the software, right-click the disk you want to repair, choose Rebuild MBR, 
and then choose the proper Operating System version. 

3. Click Apply to save all the changes to fix MBR in Windows.


or- ---- If above does not work -----


CMD:
----

Boot with original OS Disk to do a Repair:


Windows XP, Vista, 7 or 8:

1. Use the Command Prompt: in C:\\windows\system32>
- bootsect /nt60 c:\
- bootsect /nt60 SYS
- bootsect /nt60 ALL
0r-
- bootrec /RebuildBcd
- bootrec.exe /fixmbr 
- bootrec /fixboot
- Exit and now go ahead and reboot your system. In some cases, you may need to run some additional commands.
- bootsect /nt60 SYS, - or-   bootsect /nt60 ALL



Windows 10:

Do when the Automatic Repair screen appears, select Advanced Options > Troubleshoot > Command Prompt:

type:
- bootrec.exe /fixmbr
- bootrec.exe /fixboot 

Unfortunately, this doesn’t always work the first time around. In this case, Microsoft suggests exporting the 
BCD store (the place your boot data is kept) and completely rebuilding from scratch. Sounds scary, but it only 
takes a short moment.


Enter the following commands in order:


bcdedit /export c:\bcdbackup
c:
cd boot
attrib bcd -s -h -r
ren c:\boot\bcd bcd.old
bootrec.exe /rebuildbcd

The export and rebuild process should completely repair your MBR issues