Fix Unmountable Boot Volume blue screen error in Windows 10

Madalina Dinita
by Madalina Dinita
Former Managing Editor
Affiliate Disclosure
Share this article:

  • When the Windows system senses that something goes wrong, it sends users a signal by stopping everything and resulting BSoD.
  • BSoD does not necessarily mean that their PC is dead.
  • We’re always ready to help our readers solve problems with their computers, including the Blue Screen of Death with the UNMOUNTABLE_BOOT_VOLUME error message.
  • Since you're using Windows 10 daily, don't forget to check out our in-depth Windows 10 errors hub.
Fix Unmountable Boot Volume blue screen error

Errors aren’t uncommon with Windows 10. One of the more serious errors is the Blue Screen of Death with the UNMOUNTABLE_BOOT_VOLUME error message when trying to start your Windows PC.

What is the Unmountable boot volume error? This is a serious issue, as it blocks you from accessing all your files and data. Fortunately, there are a few things you can do to try and resolve this issue.

But before you begin, you will need a bootable media containing Windows 10. This could either be a Windows 10 DVD, or a bootable USB drive with Windows 10.

Once you have the media prepared, plug it into the USB port of your computer, and boot the system. Note that you may have to select boot media by pressing F8 or F12, depending on your system configuration.

How can I fix the Unmountable Boot Volume error?

1. Use Automatic Repair

  1. On the Windows Setup screen, select your language.
  2. The Repair your computer option should now appear at the bottom left corner of the window; click on it.
  3. On the screen that opens, select Troubleshoot.
  4. On the Advanced options screen select Startup Repair.
    Windows 10 Repair Boot
  5. From the list of OS installed in your system, select Windows 10.
  6. The repair should start, wait until the process is complete.
  7. Once the process is complete, restart your computer and remove the installation media.

The first thing to try is to get Automatic Repair to do the fixing for you. To use Automatic Repair, simply follow the above steps. If this didn’t resolve the issue move on to the next solution.


Automatic Repair couldn’t repair your Windows 10 PC? Check this guide to solve the issue quickly!


2. Use the Chkdsk command

  1. On the Windows Setup screen, select your language.
  2. The Repair your computer option should now appear at the bottom left corner of the window; click on it.
  3. On the screen that opens, select Troubleshoot.
  4. On the Advanced options screen select Command Prompt.
    Windows 10 Repair Boot
  5. Once the Command Prompt is open, type chkdsk /r c: and hit Enter (make sure to replace the C with the letter of the partition where you have Windows installed).
  6. The process should start; wait for it to complete.
  7. Once the process is complete, restart your computer and remove the installation media.

If the reason behind the UNMOUNTABLE_BOOT_VOLUME is some error on your hard drive, this can be detected and fixed by the Chkdsk command.


3. Fix Master Boot Record

Master Boot Record

  1. On the Windows Setup screen, select your language.
  2. The Repair your computer option should now appear at the bottom left corner of the window; click on it.
  3. On the screen that opens, select Troubleshoot.
  4. On the Advanced options screen select Command Prompt.
  5. Once the Command Prompt is open, type bootrec /fixboot and hit Enter.
  6. The process should start; wait for it to complete,
  7. Repeat the same for the following commands:
    bootrec /FixMbr
    bootrec /ScanOs
    bootrec /RebuildBcd
  8. Once the process is complete, restart your computer and remove the installation media.

The reason behind the problem could also be a bad Master Boot Record (MBR). The MBR is responsible for identifying the location of your operating system, so a malfunctioning MBR could result in boot errors.

To fix this problem, follow the above procedure.


If you’re having trouble accessing Command Prompt as an admin, then you better take a closer look at this guide.


4. Perform a few hard reboots

Strangely enough, some users reported that after performing a few hard reboots, they got rid of the Unmountable Boot Volume blue screen error.

In other words, when this error appears on the screen, press the power button of your PC until it reboots. Then, let the PC continue the reboot process, but don’t wait until the BSoD error occurs again.

Perform a new hard reboot before the BSoD error appears. Repeat the process 5 times. If the issue persists, move on to the next solution.


5. Reinstall Windows 10

If all else fails, unfortunately, you may have to reinstall Windows 10 altogether. To do this, in the initial window, once you’ve selected the language, click on Install now. Follow the on-screen instructions to reinstall Windows 10.

In case of needing extra help, don’t hesitate to take a closer look at this detailed guide in that regard.

If neither of these solutions works for you, the problem may lie in your hardware. Contact a hardware expert or the manufacturer.

FAQ: Learn more about the blue screen of death error

  • Does factory reset fix blue screen of death?

BSoD appears when Microsoft Windows encounters a critical error from which it can’t recover, including software conflicts and hardware issues. That’s why there’s no guarantee that a factory reset can fix it.

  • Can malware cause BSoD?

BSoD is mostly caused by problems with your computer’s hardware or issues with its driver software. It’s not related to malware.

  • How do I fix the Unmountable boot volume blue screen?

As you can see in this guide to fix the Unmountable boot volume blue screen, you may use the Automatic Repair or fire up the Chkdsk command.

Editor’s Note: This post was originally published in September 2017 and has been since revamped and updated in March 2020 for freshness, accuracy, and comprehensiveness.

Editor's Note: This article was originally published in September 2017 and was revamped and updated in June 2020 for freshness, accuracy, and comprehensiveness.
Was this page helpful?
Thanks for letting us know! You can also help us by leaving a review on MyWOT or Trustpillot.
Get the most from your tech with our daily tips
Tell us why!