‘Unmountable Boot Volume’ is a common Windows stop error code. The ‘boot volume’ is like a partition in the hard drive that holds the essential files of Windows.  

This error occurs when the Windows-based computer can’t start up properly. It may result in the BSOD (Blue Screen of Death) error and prevent the users to access essential data. 

This error can occur due to damaged or corrupted system files on the hard disk. Subsequently, damages in the hard drive or RAM also can cause this error. 

Sometimes, this error may arise while trying to restart the computer. To eradicate this issue, take a glance at the guide discussed below. 

Easy Hacks to Fix the ‘Unmountable Boot Volume’ Error

Before performing the below-mentioned hacks, you need to get a bootable USB disk. If you don’t have the bootable disk, then create it using Windows 10 Media Creation Tool from the official website of Microsoft. Here, you can use a 4GB flash drive for this purpose. 

There are numerous ways through which you can troubleshoot this error. However, you can perform the methods explained below: 

Fix 1: Using Automatic Repair

One of the easiest methods to fix the ‘Unmountable Boot Volume’ error is by using the Automatic repair option in Windows 10. It is recommended to perform this method if your system is repaired automatically after showing the error message.  

How to Run Automatic Repair? 

1. First of all, turn the computer off by pressing the Power button of the system. 
2. Now, insert the Windows Media Creation tool inside the flash drive. 
3. Again press the Power button to boot the system. Once the system starts up, tap on the ‘Boot from USB’ option. 
4. Afterward, select the USB drive that holds the Windows Media Creation tool.
5. Now, wait for a few seconds and let the device boot from the USB drive. 
6. Tap on the ‘Repair Your Computer’ option. You will find this option in the left pane of the window. 
7. Next, click on the ‘Troubleshoot’ button and tap on the ‘Advanced’ button. 
8. Select the ‘Startup Repair’ or ‘Automatic Repair’ option from the next page. 
9. Choose the OS that is currently installed on the system and wait until the process is complete. 

Remember that this procedure will take a few minutes to complete. Hence, keep patience for the result. But, if the error persists, then you can perform further solutions stated below. 

Fix 2: Using Chkdsk Command

Sometimes, you can also face this error due to problems with the hard drive. You can easily solve this by using the Chkdsk command. Here are the steps you can perform to apply this: 

• First and foremost, bring up the Start menu and type “command prompt” in the search bar. 
• Now, right-click on the ‘Command Prompt’ option showing as the top search result. 
• Next, choose the ‘Run as administrator’ option to open it with the Administrator’s privilege. 
• Afterward, type “chkdsk /r c:” in the command line and hit the Enter to execute it (type ‘Y’ if asked). 

Note: If the Windows partition is other than ‘C’, then you have to replace it in the above command with the appropriate one.

Now, you can check if the error still appears. Otherwise, move on to the further ways described below. 

Fix 3: Run the SFC or System File Checker

As the corrupted system files are one of the major reasons behind this issue. Hence, you can fix it using the System File Checker utility. The SFC tool comes with the Windows Operating System that helps the users to scan the entire system. 

It can also help them to repair the corrupted system files. To run the SFC tool, you can perform the steps mentioned below: 

1. First, open the Command Prompt with Admin’s privilege by following the steps stated in the previous method. 
2. Now, type the command “sfc /scannow” and execute it by pressing the Enter key from the keyboard. 

Now, wait for some time until the process finishes. If System File Checker finds any corrupted system files in the PC, then it will repair them by itself. 

Else, you can also use MBR to get rid of the ‘Unmountable Boot Volume Windows 10’ error. 

Fix 4: Using MBR or Master Boot Record 

Master Boot Record is a type of data stored in the initial sector of the hard drive. It helps in identifying the location of the OS on the hard disk, which allows loading it inside the RAM. 

Hence, you can get rid of the ‘Unmountable Boot Volume’ error by using the Master Boot Volume. To do this, you can perform the steps mentioned below: 

• First, perform the first 7 steps from fix 1. 
• Once it navigates to the Advanced window, tap on the ‘Command Prompt’ option and enter the commands given below: 

1st: bootrec /RebuildBcd

2nd: bootrec /fixMbr

3rd: bootrec /fix boot

• Hit the Enter key from the keyboard to execute them. 
• Afterward, exit from the Command Prompt window and restart the system. 

Now, you can check whether the issue has been resolved. 

Summing Up…

Now, we are going to wrap up this post. Here, we provided some effective hacks, which can help you to solve the ‘Unmountable Boot Volume’ error. 

All the methods are foolproof and you can easily implement them without any technical expertise. The same set of instructions is applicable if you are experiencing the “Stop Code Unmountable Boot Volume” problem as well. 

If you have any doubts or queries regarding this post, feel free to share them in the comment box below.