Windows 10 is the newest version of Microsoft’s family of operating systems, released in 2015. The Unmountable Boot Volume Blue Screen of Death error occurs on almost all of Microsoft’s Windows versions when the computer is unable to boot the operating system from the device itself.
If you have Windows 10 on your PC and you see the UNMOUNTABLE_BOOT_VOLUME Blue Screen of Death error when you switch it on, do not worry. It does keep you from accessing the data on your computer but the error is fixable and here is how:
You will need either a DVD of Windows 10 OS or a bootable USB Drive in order to proceed. In case you do not have either of them, burn a Windows 10 ISO file on a USB Drive on another computer and then proceed. Either way, you will need a medium to boot Windows 10 from. Once you have it, connect it to your computer with the error and boot the device from it, be it a DVD or a USB Drive. Once done, you can follow any of these four methods:
Method 1: Using Automatic Repair to fix the error
It is downright the easiest method to fix the error.
- Once you have chosen your language on the Windows Setup screen, click on the Repair Your Computer option on the bottom left.
- On the next screen that appears, click on troubleshoot.
- Select the Startup Repair option in the Advanced Options.
- Choose Windows 10.
- The repair with immediately begin. Wait patiently until it is done.
Method 2: Fixing Master Boot Record to fix the error
You are able to boot your computer normally because Master Boot Record (MBR) recognizes the location and condition of your operating system. When it malfunctions, errors such as UNMOUNTABLE_BOOT_VOLUME can occur.
- Repeat the steps you followed in Method 1 until you have Advanced Options on your screen.
- Choose Command Prompt from the Advanced Options.
- In the Command Prompt, type “bootrec /fixboot” and press Enter.
- Wait until the process is completed. Once it is done, restart your computer to see if the Blue Screen of Death still appears.
Method 3: Using Chkdsk Command to fix the error
There may be problems with your hard drive that might be causing the UNMOUNTABLE_BOOT_VOLUME error. The Chkdsk command will help you detect and fix such problems.
- Repeat the steps followed in Method 1 to access the Advanced Options and then select Command Prompt from those options.
- Type the command “chkdsk /r c:” and hit Enter. You can replace “c:” from the command with the letter you use for your boot drive accordingly.
- Wait until the process completes then restart the computer to see if the error has been fixed.
Method 4: Reinstalling Windows 10 to fix the error
If all of the above suggested methods do not work for your computer, consider reinstalling your Windows 10.
- Click on Install Now on the Windows Setup screen after you have chosen your language.
- Simply follow the given instructions to successfully reinstall your Windows 10.
There might be problems with your hardware devices if none of the above methods fix the UNMOUNTABLE_BOOT_VOLUME error on your computer. Consider consulting an expert or your computer manufacturers for further help.