How to Fix Unmountable Boot Volume in Windows 10?

Here we go again with another article explaining another BSOD error code. This time it is something called UNMOUNTABLE BOOT VOLUME. This error is much less cryptic than your usual BSOD code, but it is still quite a task for an average user to figure out what on earth is happening with a PC. This article will tell you what to do if you stuck with Unmountable Boot Volume in Windows 10.

Unmountable Boot Volume BSOD Error

Let’s start with a few words regarding this error. Usually, this happens due to a file system or partitioning errors on a hard drive or an SSD. PC can’t mount this partition to properly boot the system. This error is critical and causes BSOD. It may happen no matter what kind of drive your PC is using. Luckily for you and anyone who was struck by Unmountable Boot Volume Error in Windows 10, it is quite easy to fix this annoying problem. All you need to do is to run one simple command.

Before you start: disconnect any removable drive from your PC. Leave only internal drives connected straight to the motherboard. Try to power-cycle your PC. Hold the power button until your PC shuts itself down then boot it back as usual. Also, check your drives connection. Open your PC case and make sure all drives are connected properly and connections are not loose.

You can also check whether this problem is hardware-related by installing Windows to a different drive. Sure, this is a bit time-consuming but thus you will be sure your SSD or HDD is fine, and the problems lie within the software, not hardware.

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  1. In order to fix Unmountable Boot Volume Error in Windows 10, you need a Windows Installation media (USB drive or DVD). Boot from this drive and hit Shift + F10 on a start screen. Alternatively, click Repair Your Computer and select Command Prompt.
  2. Now, enter the following command one after another. Begin with diskpart. Press Enter and wait for the Command Prompt to show DISKPART> string.
  3. Enter list volume command and press Enter. A command prompt will show you all available drives with details about each. Here is an important thing: your C drive may have a different letter in here than in the File Explorer. Find the system drive by checking its size. C drive with 500 MB or few gigabytes is definitely not a system drive.
  4. Remember a letter of a system drive. You will need it in the next step.
  5. Enter exit command and press Enter.
  6. Now, enter chckdsk X: /r. Instead of X enter a letter of a system drive.
  7. Sit back and wait for the system to scan your drive. This may take some time depending on how large a drive is. The checking file system takes even more time if you still use such an ancient relic called HDD. Seriously, now it is the best time to switch to SSD.
  8. Restart your PC when the process is done. The problem should be gone by now.

Fix Unmountable Boot Volume Error

If you had no luck with the method above, try to fix Unmountable Boot Volume using system recovery. Again, you need Windows Installation Media to fix Windows bootloader.

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  1. Boot to the Windows Installation start screen and click Repair Your Computer.
  2. Select Troubleshoot. unmountable boot volume
  3. On the next screen, click Startup Repair. Follow the on-screen instruction and wait for the process to finish. After that, your PC should be back to normal with the Unmountable Boot Volume error fixed. unmountable boot volume windows 10

If nothing above worked, try to reinstall Windows.

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