Download MBR repair tool for Windows 10, 8.1, 8, 7 and Windows Server 2016, 2012, 2008, 2003. Go and fix the corrupted MBR on a hard drive, external hard drive, USB flash drive on which the master boot record is damaged and Windows system cannot start properly.
Hi,
Welcome to Microsoft Community.
I understand your concerned. Let me help you to fix the issue.
Let’s try simple troubleshooting steps and check if this helps in resolving the issue. Follow the below methods.
Method 1.
I would suggest you to remove external hard drive except mouse and keyboard, now try restarting the computer and check if this helps.
If the issue still persist, try the below method.
Method 2.
I would suggest you to perform automatic repair using Command Prompt under Advance Options using media creation tool. Please refer to the following article to create an installation media for Windows 10.
Refer to the steps:
After you boot your computer using Windows 10 DVD or System Repair Disc, a black screen appears with gray text 'Press any key to boot from CD or DVD'. Press any key.
Select the correct time and Keyboard type.
Click Repair your computer in the lower left corner.
Select Troubleshoot from Choose an option screen.
Click Advanced options in Troubleshoot screen.
Click on command Prompt.
Type these following commands and hit enter after each line of command:
Bootrec /fixmbr
Bootrec /fixboot
Bootrec /scanos
Bootrec /rebuildbcd
Hope this helps. Please let us know the status.
One of the effective troubleshooting steps, to fix boot issues is to repair Master Boot Record or MBR. One of the common reasons why an MBR can get corrupted is due to malware infections. Improper shutdowns can also lead to MBR corruption. Sometime we may find issues where Linux Grub is installed, and Windows is not able to detect it. On some occasions, you may get the Bootmgr is missing error. In such cases, you can run the rebuild or repair MBR to fix these issues.
The process is almost the same for Windows 10/8/7. First and foremost, you need a Windows installation DVD. Without that, it will be hard to proceed.
1] Press F8 while booting the system to go into the Windows Recovery Menu.
2] Click on Troubleshoot.
3] Click on Advanced options to get into the Automatic Repair menu.
4] We need to use the Bootrec.exe tool. Click on command prompt and type in the following commands, one after the other:
Exit and now go ahead and reboot your system. In some cases, you may need to run some additional commands.
It’s wise to backup MBR or create a System Recovery Disk so that in case something like this happens you don’t have to run for the Windows Recovery Disk. To create a system recovery drive in Windows, follow these steps:
I hope you find the article helpful. In case if you have any questions, please feel free you post it under our comments section or in our forum.
MBR Backup & HDHacker are two freeware that can help you backup and restore the MBR & Boot Sector. This post shows how to rebuild BCD.
Related read: The boot configuration data store could not be opened.
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