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Fixing unmountable boot volume error in Windows

By Eunice Samson | March 14, 2018 |

greater than 3 minutes

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With the demands of daily living, most of us want to get things done right away. That is why it is so frustrating when your Windows computer won’t start up, completely preventing you from accessing important files and data. If you’re experiencing the same problem and you see the error message “Unmountable Boot Volume,” don’t worry because we have various solutions you can try.

What Causes the Unmountable Boot Volume Error

It is uncommon to encounter the Unmountable Boot Volume error on Windows 7. On the other hand, most users reported that this issue started to show up after they upgraded to Windows 10. There are many reasons why this error occurs, and they include:

  • Corrupted files on the hard disk
  • Corrupted system files
  • Damaged RAM
  • Damaged hard drive

While this problem can be caused by various factors, sometimes, it shows up without any reason at all while you are trying to boot your computer. If you want to resolve this issue, take a look at our guide on how to fix Unmountable Boot Volume error on Windows 10.

First Things First…

As we’ve mentioned, this error prevents you from accessing the files and data on your computer. So, before we teach you how to fix Unmountable Boot Volume error on Windows 10, you have to get a bootable USB drive. If you do not have one, you can create it by downloading Windows 10 Media Creation Tool from Microsoft’s website to a 4GB flash drive. This should enable you to boot your computer from the USB drive and access troubleshooting options.

Method 1: Using Automatic Repair

One of the most convenient ways to resolve the Unmountable Boot Volume error is by using Windows 10’s Automatic Repair option. We recommend doing this even if you noticed that your computer repaired itself after showing the error message. Follow the steps below:

  1. Press the Power button to shut down your computer.
  2. Insert the flash drive with Windows Media Creation tool into the USB port.
  3. Press the Power button to boot the computer.
  4. Once your computer starts up, click Boot from USB.
  5. After that, choose the USB Drive that contains the Windows Media Creation tool.
  6. Let your computer boot from the USB drive.
  7. Click Repair Your Computer, which can be found at the lower left corner of the screen.
  8. Select Troubleshoot.
  9. Under Troubleshoot, click Advanced options.
  10. Under Advanced Options, select Automatic Repair or Startup Repair.
  11. If you cannot resolve the
    problem yourself, you can
    ask our certified PC technicians for immediate assistance in the chat right on this page.
    Select the operating system that’s currently installed on your computer.
  12. Wait for the tool to repair the files.

Keep in mind that it can take a while for the repair process to be completed. So, you have to be patient, and do not attempt to abort it.

Method 2: Using Chkdsk

In some cases, problems on the hard drive may cause the Unmountable Boot Volume error. This can be fixed by using the Command Prompt to run Chkdsk. Follow the instructions below.

  1. Press the Power button to shut down your computer.
  2. Follow steps two to nine from the first method.
  3. Once you get to the Advanced Options for troubleshooting, select Command Prompt.
  4. Once you’re in the Command Prompt window, type “chkdsk /r c:” (no quotes), then hit Enter.

Note: You have to replace “c” accordingly if that is not the bootable drive you’re using.

  1. Wait while the Chkdsk function is checking your drive for errors. Keep in mind that this might take a while.
  2. After Chkdsk completes the process, you can restart your computer and see if the issue has been resolved.

Method 3: Repairing Master Boot Record

If the first two methods did not work for you, you can also try to repair Master Boot Record. Here are the steps:

  1. Press the Power button to shut down your computer.
  2. Follow steps two to nine from the first method.
  3. Once you reach the Advanced Options for troubleshooting, select Command Prompt.
  4. In the Command Prompt, type “bootrec /fixboot” (no quotes), then hit Enter.
  5. Wait until the process has been completed.
  6. Restart your computer and check if the issue has been resolved.

These methods should be able to fix the Unmountable Boot Volume error on Windows 7 or Windows 10. On the other hand, if the issue persists, you can always try to re-install your operating system. Once the problem has been fixed, make sure you update your drivers to prevent it from occurring again. We recommend that you use Auslogics Driver Updater. With just a click of a button, you can update your drivers to the latest versions recommended by the manufacturer.


Resolve PC Issues with Driver Updater

Unstable PC performance is often caused by outdated or corrupt drivers. Auslogics Driver Updater diagnoses driver issues and lets you update old drivers all at once or one at a time to get your PC running smoother


Have you experienced the same problem?

Let us know what you did to fix the issue by commenting below!

Fed up with your slow PC? Tired of waiting for Windows to start up? Take a look at the most common reasons behind poor performance and the best ways to deal with them here.


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