Unmountable Boot Volume Fix Windows

unmountable boot volume error fix

Resolving the Unmountable Boot Volume Error: Troubleshooting and Preventive Measures


Dealing with computer errors can be a frustrating experience, especially when they prevent your system from booting up. One such error that often causes panic among users is the “Unmountable Boot Volume” error. This error message, displayed as a dreaded Blue Screen of Death (BSOD), indicates a problem with the booting process of your operating system. In this article, we will dive into the causes of the Unmountable Boot Volume error and provide you with effective solutions to resolve it. Additionally, we will discuss preventive measures to minimize the chances of encountering this error in the future.

unmountable boot volume error fix

Understanding Unmountable Boot Volume Error

The Unmountable Boot Volume error occurs when the operating system is unable to mount the boot volume, which contains essential files needed to start the system. Several factors can contribute to this error:

1. Corrupted or Damaged Hard Drive:

A corrupt or damaged hard drive can prevent the system from reading the necessary boot files. This can be caused by physical damage, malware infections, or sudden power outages.

2. Issues with the File System:

If the file system on the boot volume becomes corrupted or encounters errors, the system may fail to mount it properly. This can occur due to improper shutdowns, software conflicts, or disk errors.

3. Outdated or Incompatible Device Drivers:

Incompatible or outdated device drivers can interfere with the booting process and lead to the Unmountable Boot Volume error. When the system attempts to load a faulty driver, it can trigger the error message.

4. Hardware Problems:

Faulty hardware components, such as a malfunctioning hard drive controller or RAM module, can also cause the Unmountable Boot Volume error. In such cases, the system may struggle to read or access the boot volume.


Common Symptoms of Unmountable Boot Volume Error


1. Blue Screen of Death (BSOD):

The most noticeable sign of the Unmountable Boot Volume error is the appearance of a Blue Screen of Death. This screen contains the error message and may include a specific error code associated with the issue.

2. Inability to Boot into the Operating System:

When encountering the Unmountable Boot Volume error, your system may fail to boot into the operating system. It can get stuck in a boot loop or display error messages during the startup process.

3. Frequent System Crashes or Freezes:

As the Unmountable Boot Volume error affects the booting process, it can also cause your system to experience frequent crashes or freezes while in operation. These crashes may occur randomly or when performing specific tasks.

4. Error Codes Associated with the Issue:

Along with the BSOD, you might encounter error codes such as “STOP: 0x000000ED” or “INACCESSIBLE_BOOT_DEVICE.” These codes provide additional information to help diagnose and resolve the problem.


Resolving Unmountable Boot Volume Error


Method 1: Check Hardware Connections

Start by ensuring that all hardware connections are secure and properly connected. Follow these steps:

  1. Check Cables and Connectors: Examine the cables connecting your hard drive and other storage devices to the motherboard. Ensure they are firmly attached and not damaged.
  2. Reseating Hardware Components: If the error persists, try removing and reinserting the RAM modules and other internal components. This can help eliminate any loose connections that might be causing the problem.


Method 2: Running Built-in Repair Tools

Windows provides several built-in repair tools that can help fix the Unmountable Boot Volume error:


Using Startup Repair: Boot your system from a Windows installation disk or recovery drive. Select the “Repair your computer” option and choose “Startup Repair” to automatically scan and repair common boot-related issues.


Employing System Restore: If you have previously created a system restore point, you can use it to revert your system to a previous working state. This can help eliminate any recent software or driver changes that may have caused the error.


Running the chkdsk Command: Access the Command Prompt through the Windows recovery options. Then, execute the “chkdsk /r” command to scan and repair disk errors on the boot volume. This process may take some time to complete.

Unmountable Boot Volume fix 3


Method 3: Rebuilding the Master Boot Record (MBR)

The Master Boot Record (MBR) contains vital information for the booting process. Rebuilding it can resolve boot-related errors like the Unmountable Boot Volume error. Follow these steps:

Unmountable Boot Volume fix 2

  1. Accessing the Command Prompt: Boot from a Windows installation disk or recovery drive and select the Command Prompt option from the recovery options.
  2. Executing bootrec Commands: In the Command Prompt, type the following commands one by one and press Enter after each:
    • bootrec /fixmbr
    • bootrec /fixboot
    • bootrec /rebuildbcd

    These commands will repair the MBR, fix boot-related issues, and rebuild the boot configuration data.


Method 4: Reinstalling the Operating System

If all else fails, reinstalling the operating system can resolve the Unmountable Boot Volume error. Before proceeding, ensure you have backed up your important files. Follow these steps:

  1. Backing up Important Data: Connect your hard drive to another working computer or use a bootable USB drive to access your files. Copy important documents, photos, and other files to an external storage device.
  2. Performing a Clean Installation: Insert the Windows installation disk or create a bootable USB drive. Follow the on-screen instructions to reinstall the operating system from scratch. Remember to format the system drive during the installation process.


Preventing Unmountable Boot Volume Error

While it may not be possible to completely eliminate the risk of encountering the Unmountable Boot Volume error, you can take preventive measures to minimize its occurrence:

A. Regularly Update Device Drivers and Firmware:

Keep your device drivers and firmware up to date to ensure compatibility and address known issues that can lead to boot-related errors.

B. Install Reputable Antivirus Software:

Use reliable antivirus software and keep it updated to protect your system from malware infections that can corrupt essential boot files.

C. Avoid Sudden Power Loss or Improper Shutdowns:

Ensure your system is connected to a stable power source and avoid sudden power outages. Perform proper shutdowns to prevent file system corruption and other errors.

D. Perform Regular Backups of Important Data:

Regularly back up your important files to an external storage device or cloud storage. This ensures that even if you encounter the Unmountable Boot Volume error, you won’t lose critical data.

E. Use Disk Maintenance Tools to Check and Repair File System Issues:

Utilize disk maintenance tools like chkdsk or third-party disk repair software to scan and fix file system errors that can cause boot-related issues.



The Unmountable Boot Volume error can be a challenging issue to tackle, but with the right knowledge and troubleshooting steps, you can resolve it effectively. Remember to check hardware connections, utilize built-in repair tools, rebuild the MBR if needed, and consider a clean OS reinstallation as a last resort. By following preventive measures such as keeping your system updated, using reliable antivirus software, and performing regular backups, you can minimize the chances of encountering the Unmountable Boot Volume error and ensure a smoother computing experience.



I hold a Bachlors degree in Information Systems and have worked in technology for over 20 years. I currently work as a Network Engineer In Charlotte NC. I enjoy helping others navigate technology in an easy to understand way.

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About Me

Hi Everyone! My name is Adam, I am the Editor of Wally Home. I hold a bachelors degree in information systems and more then 20 years experience in technology. I am currently working as a Network Engineer in Charlotte NC. I love sharing my knowledge to help others with technology. I hope you find the information helpful and informative. Enjoy your stay!

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