The boot troubleshooting is to repair the Master Boot Record or MBR. One of the common reasons why an MBR can become corrupt is due to a malware infection. Incorrect shutdowns can also lead to MBR corruption. Sometimes we can find problems where Linux Grub is installed, and Windows cannot detect it. In some cases, you may get Bootmgr is missing error. In such cases, you can run a rebuild or repair MBR to fix these problems.
Repair Master Boot Record (MBR)
The process is almost the same for Windows 10/8/7. First, you need a Windows installation disc. Without that, it would be challenging to proceed. Please don’t ask where you can download it as we don’t have permission to discuss the sources where we can find the installation DVD.
Press F8 during system boot to enter Windows Recovery Menu. Unlike other versions of Windows 8, the recovery menu has a Metro UI style.
Click Advanced options to enter the Auto Repair menu.
We need to use the Bootrec.exe tool. Click command prompt and enter the following commands, one of the following:
Bootrec / RebuildBcd
bootrec / 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
You should back up the MBR or create a System Recovery Disk so that in case something happens, you don’t have to run Windows Recovery Disk. To create a system recovery drive in Windows, follow these steps:
- Press Win + R and type RecoveryDrive.exe
- Click Next
- Once you insert the USB drive, it will start creating Recovery for your USB drive.
I hope you found the article helpful. In case you have any questions, please feel free you post them under our comments section or in our forum.