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 very common and prevents users to log in to their Windows. The causes can be many, however, you don’t have to worry much. We have many methods that can easily help you Fix Unmountable boot volume problem in Windows 10, 8 and even XP. 

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

What happens if you face this error?

It is important 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 the 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.

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

How to Fix Unmountable Boot Volume Error? 

There are various methods you can go with but we are only listing the tested and proven ways to fix this problem. Lets start with the first method which is also known as a lucky card.

1. Reboot your Computer

I advise you to 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 unmountable boot volume error. If it would not work with you then try the other methods.

2. Check and Repair Boot Drive errors

It is a function available in the properties of the boot drive which helps to check thoroughly the errors within it. Sometimes this page helps users to fix such a problem within a few seconds with the help of 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 error and fix it within a moment.

3. Run Automatic Repair

Automatic Repair is a feature developed to help windows user to 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. Wait for some minutes until utility complete its repair program.

Step 5: Reboot your Computer after the repair completed.


SFC/SCANNOW is a command line which scans all the protected system files and replaces corrupted files with the cached copy which is located at %WinDir%\System32\dllcache. Hence, this command line helps to fix unmountable boot volume error with the help of 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 a very important command prompt tool which helps to check the hard drive for errors. These errors could be the possible reason behind the occurrence of 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 the Windows to Repair.

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

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

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

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

This should fix the problem and if it is something 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.

Leave a Reply