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Fixed: Unmountable Boot Volume Windows 11

This guide discusses the issue of 'Unmountable Boot Volume' in Windows 11. Explore its causes, troubleshooting steps, and fixes to regain access to your system.

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Updated by Cici on Jan 04, 2024

The critical error Unmountable Boot Volume Windows 11 indicates that the operating system cannot access or mount the boot drive, which includes crucial files needed for the system to start. This problem will cause the following symptoms of Windows 11:

  • The error message appears on the blue screen of death (BSOD).
  • The system restarts in a loop due to an inability to boot into Windows.
  • Automatic attempts to correct the problem fail to fix it.
  • Accessibility issues with data and system files on the primary drive

If you are dealing with an unmountable boot volume Windows 11 error, this guide will help you. EaseUS has covered five possible fixes and the common causes of the issue.

If you meet the similar Unmountable Boot Volume Windows 10/8/7, this guide is also efficient for other operating systems.

How to Fix Unmountable Boot Volume Windows 11

Let's discover how to solve the unmountable boot volume problem in Windows 11. Feel free to choose any solution as per your needs.

Keep reading, and we will provide step-by-step guides to fix the unmountable boot volume Windows 11 errors. And if you think this guide is helpful, click the buttons and share it with someone in need.


Fix 1. Use Auto Repair

Windows 11 allows users to repair the unmountable boot error automatically. The "Auto Repair" utility of Windows is designed to troubleshoot and fix boot-related issues by itself. Use the Windows 10/11 installation media to access the automated repair functionality. Here are the steps to troubleshoot the issue with Auto Repair:

Step 1: Connect a USB media drive and turn on your system. It will allow you access to the repair menu.

Step 2: Wait to boot the computer and select the "Repair your computer" option once booted.

repair your computer

Step 3: Select "Troubleshoot" for the "Advanced options." 

Step 4: Choose "Repair your computer" from the list, then select the "Troubleshoot" option. 

Step 5: Click "Startup Repair" and let the system fix the unmountable boot volume error. 

startup repair

Step 6: Restart the PC and check if the issue is fixed. 

If Auto Repair fails to repair the issue, try repairing MBR using the recommended tool. 

Fix 2. Repair MBR

Master Boot Record in Windows computers holds partition and system-related files. These files hold the OS information that helps the computer to boot properly. The corrupted MBR system of your computer might be responsible for the unmountable boot volume Windows 11 error. 

EaseUS Partition Master is a free solution to repair MBR. This MBR repairing tool prevents you from digging deeper through complex manual procedures. It offers a "Repair MBR" feature that is easily accessible and specially designed to ease MBR repairing. Its friendly interface and additional features help users quickly fix multiple disk-related problems. You can deal with unmountable boot volumes or unbootable computers, cutting down on downtime and increasing productivity.

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Download EaseUS Partition Master to repair the MBR and restore the system's booting functionality in one click. 

Step 1. Create a WinPE bootable disk

  • Launch EaseUS Partition Master, and click "Bootable Media" on the toolbar. Select "Create bootable media".
  • Click "Next" to finish the process.
create a bootable disk

Step 2. Boot EaseUS Partition Master Bootable USB

  • Connect the bootable USB or CD/DVD to your PC. 
  • Press F2 or Del when you restart the computer to enter the BIOS screen. Set and boot your computer from "Removable Devices" or "CD-ROM Drive". And then EaseUS Partition Master will run automatically.

Step 3. Rebuild MBR

  • Click "Toolkit" and choose "Rebuild MBR".

rebuild MBR

  • Select the disk and the type of MBR. Then, click "Rebuild".
rebuild MBR
  • After that, you can see "MBR has been successfully rebuilt on Disk X".
rebuild MBR

The tool provides a simple solution to fix MBR errors, and it also fixes any boot-related issues. Here are some of the situations where users often use to repair MBR or create bootable USB to fix other boot errors:

If you encounter other errors, such as corrupted hard drives or file systems, this tool can help you solve them quickly and easily. Don't hesitate to download it for free!

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Windows 11/10/8/7100% Secure

Fix 3. Run SFC

You can try running SFC if you know the basic CMD commands. SFC is an inbuilt Windows tool to check and repair corrupted system files causing an unmountable boot volume error. Refer to the following steps to run SFC in Windows 11.

Step 1: Open the menu from the installation/recovery drive and click "Troubleshoot."

Step 2: Go to the "Advanced Options" and select "Command Prompt."

Step 3: Type the following command in the CMD window and hit the "Enter" key.

sfc /scannow

run sfc

Step 4: Wait until you see the message "Verification 100% complete."

Step 5: Reboot your computer when the verification is finished.

Check if the unmountable boot volume problem is solved. If the SFC SCANNOW stuck at verification, you can turn to EaseUS Partition Master for help.

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Fix 4. Run the CHKDSK

This procedure to perform this method is similar to the previous one. However, you are required to run the CHKDSK command to fix the error. This CMD command is easier to use and quickly troubleshoots disk problems. Let's see how to run CHKDSK to fix hard drive error:

Step 1: Reboot your computer with an installation USB drive.

Step 2: Select Troubleshoot < Advanced Options < Command Prompt.

Step 3: Type the following command and hit "Enter" in the Command Prompt window. 

chkdsk h:/f

run chkdsk

Step 4: Type "Y" and hit Enter when asked to schedule the check after a reboot.

Step 5: Restart the computer and wait for some time. The operating system may take a while to recognize the boot volume. 

Fix 5. Use Boot Repair Utility

If none of the techniques described above are successful, use a free Windows boot repair tool - EaseUS Partition Master. Along with MBR repairing (mentioned in a fix 2), it offers several useful functions to solve disk-related issues, such as Unmountable boot volume Windows 11. Its "boot repair" feature is designed to repair boot errors automatically since you are trying to fix the boot volume issue. 

The software has been thoroughly developed through extensive research and development. The software's algorithms have been perfected by carefully examining numerous boot issues to address common boot problems and other typical disk errors. This tool's UI and easy functionality help it become a versatile disk solution. 

Try the free version of EaseUS Partition Master and enjoy its benefits:

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Step 1. Start EaseUS Partition Master after connecting the external drive/USB to your computer, go to "Bootable Media," and click "Create bootable media."

create easeus partition master bootable disk

Step 2. Select an available USB Drive or CD/DVD and click "Create." You can also burn the Windows ISO file to the storage media.

create easeus partition master bootable disk

Step 3. Connect the created bootable drive to the new computer and reboot the computer by pressing and holding F2/Del to enter the BIOS. Then, set the WinPE bootable drive as the boot disk and press F10 to exit.

Step 4. Boot the computer again and enter the WinPE interface. Then, open EaseUS Partition Master and click "Boot Repair" under the "Toolkit" option.

open boot repair

Step 5: Select the system you want to repair and click "Repair."

click  repair

Step 6. Wait a moment, and you will receive an alert that the system has been successfully repaired. Click "OK" to complete the boot repair process.

click ok to complete the repair

Why Unmountable Boot Volume Windows 11

Unmountable Boot Volume Windows 11 is a critical error that can occur due to various underlying issues. Here are the most common reasons:

  • System file corruption: Corrupted system files can prevent the disk from being mounted and interfere with the boot process.
  • Hard disk drive corruption: Physical damage to the hard drive or data corruption makes it difficult for the OS to load correctly.
  • Boot volume corruption: Corruption of the boot volume's file prevents the system from mounting the boot volume during startup.
  • Damaged RAM: Data corruption caused by faulty RAM modules has the potential to slow down the boot process.
  • Improper BIOS configuration: Incorrect settings in the BIOS could hinder the boot process and result in errors.
  • Windows update error: System files might be disrupted by a faulty or incomplete Windows update, making the boot drive unmountable.


We hope the article helped you to fix the unmountable boot volume Windows 11 issue. We have covered all potential solutions, including inbuild and third-party Windows tools. EaseUS Partition Master is the recommended tool with its advanced features. The tool allows users to navigate and solve boot problems.

Free Download 

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FAQs About Unmountable Boot Volume Windows 11 

Please follow this FAQs section for more in-depth assistance about the topic discussed on this page. Refer to the comprehensive answers below.

1. How can I fix the reboot and select the proper boot device in Windows 11?

Try the following processes if you encounter the "Unmountable Boot Volume" error:

Step 1: Restart your computer and hold the "Shift" key to access the "Advanced Startup" options. 

Step 2: Select "Troubleshoot," then "Advanced options," and open "Command Prompt."

Step 3: Type the following command and hit "Enter."

chkdsk /f /r

Restart your computer after the process is completed.

2. How to fix unmountable boot volume in BIOS?

To fix the system boot problem, follow these steps: 

Step 1: Restart PC and enter the BIOS configuration. Generally, F2, F10, F12, or Del. keys use to enter BIOS settings.

Step 2: Navigate the "Boot" tab using arrow keys. 

Step 3: Select your primary hard drive first on the list. Use the "+" or "-" keys to move the drive on the list.

Step 4: Select the "Save changes and exit" to quit BIOS. See if your computer boots properly.

3. How to run an unmountable boot volume fix without a CD?

You can use a USB drive instead of a CD to run as a boot volume. Create a bootable of this use to install the correct Windows installation files in the drive. To do so, you can use the Windows Media Creation Tool on another Windows 11 computer. Connect the drive to your computer and set it as the first boot from the BIOS settings.

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About the Author

Updated by Cici

Cici is the junior editor of the writing team of EaseUS. She accepted the systematic training on computers at EaseUS for over one year. Now, she wrote a lot of professional articles to help people resolve the issues of hard drive corruption, computer boot errors, and disk partition problems.

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