How to Fix Unmountable Boot Volume Error [5 Ways]

Are you not able to start your Windows 8 or 10 PC? Are you getting a BSOD error that says “Unmountable boot volume”? Well, you are not alone. This error is common and prevents users from logging in to their Windows. The causes can be many. However, you don’t have to worry much. We have many methods to quickly help you Fix the Unmountable boot volume problems in Windows 10, 8, and even XP. 

This article will cover everything that you should know about this problem. Let’s start with some symptoms and causes of this common error. 

What happens if you face this error?

It is essential to talk about the symptoms before we enlist the causes. Your system will start running slowly before the error message appears. Your computer will be shut down after showing this error to prevent Windows from any further harm. At this stage, your PC is useless until the error gets fixed.


There are many possible causes behind the occurrence of unmountable_boot_volume error.

One major among the other causes could be a virus. Improper PC handling during everyday use and without proper maintenance can corrupt the system’s registry. It is generally observed that the system’s registry can quickly become corrupt after being ignored for too long. Thus the error possibly showed up after the registry became corrupt.

How to Fix Unmountable Boot Volume Error? 

You can go with various methods, but we are only listing the tested and proven ways to fix this problem. Let us start with the first method, also known as a lucky card.

1. Reboot your Computer

Try this method as a priority because it may be your lucky day, and it gets fixed by just rebooting your computer. Thus you need to unplug all the connections and hold for at least 5 minutes. After that, plug in all the connections and try to reboot your PC to fix the unmountable boot volume error. If it would not work for you, then try the other methods.

2. Check and Repair Boot Drive errors

It is a function available in the boot drive properties, which helps to check the errors within it thoroughly. Sometimes this page allows users to fix such a problem within a few seconds with the help of the Check tool. Hence, follow these steps to fix the error.

Step 1: Right-click on the boot drive and select the Properties option.

Step 2: Click on Tools to switch the tab.

Step 3: Select the Check button to proceed further.

Step 4: Windows will check for errors and fix them within a moment.

3. Run Automatic Repair

Automatic Repair is a feature developed to help Windows users fix PC issues. You need to bring a windows setup drive and then follow these steps.

Step 1: Boot your PC using Windows DVD or USB.

Step 2: Select Repair your Computer from the available options.

Step 3: Follow this path to complete the process:

Troubleshoot > Advanced Options > Automatic Repair > Next

Step 4: Select your OS to be repaired. Please wait for some minutes until the utility completes its repair program.

Step 5: Reboot your Computer after the repair is completed.


SFC/SCANNOW is a command line that scans all the protected system files and replaces corrupted files with the cached copy located at %WinDir%\System32\dllcache. Hence, this command line helps to fix unmountable boot volume errors with the help of the following steps.

Step 1: Restart your Computer using Windows DVD or USB drive.

Step 2: Choose to Repair your Computer from the Windows setup panel.

Step 3: Select Troubleshoot and then Advanced Options. Select Command Prompt to proceed further.

Step 4: Type sfc/scannow in the command line and press enter to continue.

Step 5: Reboot your PC when the process is finished.

5. Use CHKDSK to fix it

It is an essential command prompt tool that helps to check the hard drive for errors. These errors could be the possible reason behind this error in Windows XP, 8, and 10. Follow the given steps to get rid of this error.

Step 1: Reboot your computer and run Windows to Repair.

Step 2: Select Safe mode with Command Prompt from the Repair your Computer tab list.

Step 3: At the Command Prompt, type chkdsk /r c: and hit enter (c is the bootable drive letter).

Step 4: After completing the check disk, it will ask you a question regarding checking the disk when the system restarts. Press Y for yes so it can check next time it restarts.

Step 5: Reboot your computer and wait for some time until chkdsk checks your drive for errors. It takes a long time, so be patient.

This should fix the problem; if it is serious, the scan results will list the problem.

If nothing works, you can also reinstall Windows. This will surely fix the problem.

Final Words

Although the best way to deal with this error is to let the computer system do its job and run the windows repair wizard, we have already discussed the different methods to fix this error. Hence, this error isn’t a big deal now for the users.