6 Solutions to Fix Unmountable Boot Volume Windows 10/8/7

Quick Navigation to Unmountable Boot Volume Fixes:

Before you are going to try the solutions in this post, follow the GUARANTEED SOLUTIONS in this video (from Qiling):

• To resolve system file errors and boot errors using a Windows installation disc, follow these steps: Insert the Windows installation disc into your computer's CD/DVD drive or USB port, and restart your computer. As the computer boots, press the key to enter the BIOS settings (usually F2, F12, or Del), and set the USB drive or CD/DVD drive as the first boot device.
• Fixing BCD errors is crucial as they often cause system boot issues. The Bcdedit command can resolve most BCD errors, making the computer bootable again.
• To fix a BSOD, try uninstalling software or drivers in safe mode, which can help resolve the issue. If you're still experiencing problems, there are additional fixes mentioned in this post that you can explore.

Overview of Unmountable Boot Volume Issue

Users may encounter the Blue Screen of Death error, which prevents them from accessing the Windows operating system and booting their PC. When this happens, they're usually prompted to restart with a detailed message indicating the problem. One common error message is "UNMOUNTABLE_BOOT_VOLUME", which often appears on HP, Lenovo, Dell, and Toshiba laptops running Windows 10/8/7/XP.

Professional technicians attribute the unmountable boot volume error to several reasons.

• Corrupted system files
• Disk errors
• Damaged boot volume
• Damaged RAM and more...

Many reasons can cause this error, and besides the reasons mentioned earlier, there are other possible causes. You can learn fixes for each reason, whether you have a Windows installation CD or not. If you have important files on the PC and need to recover them urgently, you can skip to Part 3 to learn how to recover data from a PC that cannot boot.

Part 1. Fix Unmountable Boot Volume Without CD

If you don't have a Windows installation CD/disk, download Qiling partition software first and use it to create a USB bootable disk. Then, change the boot sequence of the unbootable PC in BIOS and restart from the WinPE bootable disk. This will guide you to the main window of Qiling partition software, where you can try the following two fixes to deal with the unmountable boot volume error.

Fix 1. Check and Repair Boot Drive Errors

Right-To check and repair errors on your hard drive, click on the boot drive and select the "Check partition" option. Choose a method for checking the drive and click "OK". The software will then scan the hard disk partition and automatically repair any errors found. Once the process is complete, click "OK" to finish.

Fix 2. Fix MBR (Master Boot Record)

Step 1. Create a WinPE bootable disk

• Launch Qiling Partition Master, click "Create bootable media" on the toolbar, then select a USB drive or CD/DVD to create the bootable disk.
• Click "Proceed" to finish the process.

Step 2. Boot Qiling Partition Master Bootable USB

• Connect the bootable USB or CD/DVD to your PC. 
• To enter the BIOS screen, press F2 or Del when restarting the computer. Once in the BIOS, set your computer to boot from "Removable Devices" or "CD-ROM Drive". After doing so, Qiling Partition Master will automatically run.

Step 3. Rebuild MBR

• The user needs to click on the disk whose Master Boot Record (MBR) is damaged. To proceed, they should select the option to "Fix boot".
• Select the type of MBR with the current operating system.

• Once you've completed the steps to create a new MBR, you can proceed with the process. This will allow your computer to boot normally again.

Part 2. Fix Unmountable Boot Volume Using Windows Installation CD/Disk

If you don't want to use third-To solve the unmountable boot volume problem, you can create a Windows installation CD or USB device with party software. Boot your PC from the CD or USB device, then select "Repair Your Computer" in the Windows Setup window to access the "Choose an option" menu.

Fix 1. Run Automatic Repair

Step 1. To resolve the issue, go to the menu and select "Troubleshoot > Advanced Options > Startup Repair".

Step 2. Select the target operating system to fix. Windows will initiate the repair and then restart.

Fix 2. Use SFC /SCANNOW to Repair System Files

Step 1. To access the Command Prompt from the Windows menu, navigate to "Troubleshoot > Advanced Options > Command Prompt".

Step 2. In the command line, type sfc /scannow and press Enter button. 

Step 3. Restart your computer when the process is finished.

Fix 3. Run CHKDSK to Repair Boot Drive

Step 1. Open Command Prompt, type chkdsk /r c:, and press Enter.

Step 2. Type Y and hit "Enter" when you are prompted to schedule the check after a reboot. 

Step 3. I've rebooted the system. Please let the check proceed. It might take a while.

Fix 4. Fix MBR

To complete this task, open Command Prompt, type the following commands, and press Enter after each one: [insert commands here].

Part 3. Recover Data When Unmountable Boot Volume Error Attacks

If you have important files saved on a PC that won't boot, you can try recovering data using Deep Data Recovery Pro with Bootable Media. This tool is specifically designed for data recovery cases where the system crashes or has booting problems, making it ideal for rescuing files when the hard disk is dead, damaged, or failed.

• Free Download
• Windows 11/10/8/7, 100% Secure

Step 1. To launch Deep Data Recovery on your Windows computer, select the file types you want to recover and click "Next" to proceed.

Step 2. Choose the place where you lost data. Then, click "Scan".

Step 3. After scanning, use the file format filter to locate the desired files, and then click the "Preview" button or double-click a file to view its content.

Step 4. To recover lost data, select the file you want to recover, check the box next to it, and then click the "Recover" button to restore the data to a secure location.

Conclusion

You can try any one of the 6 effective ways to solve the unmountable boot volume issue on Windows 10. Alternatively, you can watch the video at the top to learn how to solve common blue screen errors, and follow the details in the video for a solution. If you have a better solution, feel free to share it!

Unmountable Bootable Volume (People Also Ask)

There are some FAQs about unmountable bootable volume:

1. What is the boot volume?

The boot volume is the disk volume that contains the Windows operating system files and supporting files.

2. What causes unmountable boot volume?

• Corrupted system files
• Disk errors
• Damaged boot volume
• Damaged RAM and more...

3. How do I fix unmountable boot volume?

• 1. Check and Repair Boot Drive Errors
• 2. Fix MBR (Master Boot Record)
• 3. Run Automatic Repair
• 4. Use SFC /SCANNOW to Repair System Files
• 5. Run CHKDSK to Repair Boot Drive
• 6. Fix MBR

4. How do I boot from a USB drive in Windows 10?

• 1. Create an emergency disk with Qiling partition software.
• 2. Connect the bootable USB drive to a USB port on your PC. Turn on or restart your PC.
• 3. To change your computer boot sequence in BIOS, press F2, Del, or F8, and set it to boot from a Removable Devices or CD-ROM Drive before the Hard Drive. Once you've made the change, press F10 to save and exit.

Related Articles

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• Fix Windows 10 Doesn't Recognize or Detect Second Hard Drive Error
• How to Recover Data from SD Card Formatted As Internal Storage

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