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Fix Unmountable Boot Volume Error in Windows 10 & 11 (2025 Guide)

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Are you hit with the Unmountable Boot Volume error, which prevents you from signing in to Windows? Don’t stress — it’s fixable. In this guide, you will learn about 6 proven solutions designed for both Windows 10 and Windows 11.

Option 1: Do Nothing

Yes, you read it right. If you’re accidentally hit with the Unmountable Boot Volume error, doing nothing about it should be your first choice.

Once your PC reboots and starts automatic repair, you’ll get a black screen with the mouse cursor. In about 15-20 minutes after that, you’ll be redirected to the Windows login screen.

If this doesn’t help, proceed to Option #2.


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Option 2: Run Startup Repair

  1. Boot your PC from a CD/DVD or a USB drive.
  2. Choose the Repair your computer option located at the bottom left corner of the screen.
  3. Select Troubleshoot > Advanced options > Automatic Repair.
  4. Click Next and select the OS you want to repair.
  5. Let the system attempt to fix itself automatically.

Option 3: Fix Master Boot Record

  1. Boot from your Windows installation media.
  2. Go to Repair your computer > Troubleshoot > Advanced options > Command Prompt.
  3. Run these commands one by one:
bootrec /fixmbr
bootrec /fixboot
bootrec /rebuildbcd

This usually reinstates crucial boot files and allows Windows to start up again.

Option 4: Run CHKDSK – Detect & Repair Disk Errors

  1. Boot into Command Prompt from the Windows install media as described above.
  2. Run:
chkdsk /r C:

Replace C: if your system drive letter is different. Allow the utility to find any corrupted files/systems.

Option 5: Use SFC (System File Checker)

  1. Launch Command Prompt via Windows installation media.
  2. Enter: sfc /scannow

This will allow you to restore any corrupted system files and may help resolve the issue without the need to perform a full reinstall.

Option 6: Reinstall Windows 10/11

If none of the previous options help, boot from your recovery media source and proceed to reinstalling the OS.

Did you find this post helpful? See more Windows tips & tricks on our blog. Visit our website to learn more about the SetMe remote desktop application:

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