7 Solutions to Repair Unmountable Boot Volume in Windows 10/8/7

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Before attempting the solutions in this post, please follow the GUARANTEED SOLUTIONS demonstrated in this video (featuring tools):

1 - Repair system file errors and boot issues using the Windows installation disc. 2 - Resolve BCD errors. BCD errors often cause system boot problems, and the Bcdedit command can fix most BCD errors to make the computer bootable. 3 - Uninstall software or drivers in Safe Mode to fix Blue Screen of Death (BSOD) issues. If you wish to learn more fixes, please continue reading.

Overview of the "Unmountable Boot Volume" Issue

Occasionally, users may be denied access to the Windows operating system and be unable to boot their PC due to the Blue Screen of Death error. When encountering this issue, they typically see the message "Your PC ran into a problem and needs to restart" along with other detailed information that can aid in identifying the cause of the error and how to resolve it. UNMOUNTABLE_BOOT_VOLUME is a common error detail that often appears on HP, Lenovo, Dell, and Toshiba laptops running Windows 10/8/7/XP.

According to professional technicians, the unmountable boot volume error is attributed to the following reasons:

1. Corrupted system files
2. Disk errors
3. Damaged boot volume
4. Damaged RAM and more...

Aside from the reasons mentioned above, many other factors can cause this error. Next, you'll learn solutions for each reason, regardless of whether you have a Windows installation CD/disk or not. If you have crucial files saved on the PC and urgently need to retrieve them, you can skip directly to Part 3 to learn how to recover data from the unbootable PC.

Part 1. Fix Unmountable Boot Volume Without CD

If you do not have a Windows installation CD/disk, first download a partition tool and use it to create a USB bootable disk. Then, attempt the following two solutions to address the unmountable boot volume error. Before beginning, alter the boot sequence of the unbootable PC in the BIOS, and then restart the computer from the WinPE bootable disk. This will lead you to the main window of the partition software.

Fix 1: Check and Repair Boot Drive Errors

Right-click on the boot drive and select the "Check partition" option. Then, choose the method you wish to use to check the hard drive and click "OK." The software will automatically scan the hard disk partition and repair any errors for you. Lastly, click "OK" to complete the process.

Solution 2: Repair the Master Boot Record (MBR)

Step 1. Create a WinPE bootable disk

1. Launch tools Partition Master, and click "Bootable Media" on the toolbar. Select "Create bootable media". 2. Click "Next" to complete the process.

Step 2. Boot the System using Partition Master Bootable USB

1. Connect the bootable USB or CD/DVD to your PC. 2. Restart your computer and press F2 or Del to access the BIOS screen. Set your computer to boot from "Removable Devices" or "CD-ROM Drive."随后，Partition Master工具将自动运行。

Step 3. Rebuild MBR

Click "Toolkit" and select "Rebuild MBR".

Select the disk and the type of MBR, and then click "Rebuild".

Then you'll see the message "MBR has been successfully rebuilt on Disk X".

Fix 3. Utilize Boot Repair Utility

MiniTool Partition Wizard is one of the best Windows boot repair tools, and it also caters to advanced users for fixing boot issues. After extensive research and development, it enables you to automatically fix unmountable volume errors.

If your computer is unbootable now, begin with Step 1 here. If it's bootable, proceed to Step 3 and commence the process.

Step 1. Prepare a new PC and create a bootable media using Partition Master tools

1. On a new computer, connect an empty USB drive to your PC.
2. Install and launch the Partition Master tool, then navigate to the Bootable Media section. Select "Create bootable media" and click "Next".
3. Choose the empty USB or external disk as the target disk to create the bootable media for generating a Blue Screen error checking tool.

Step 2. Boot the PC from the tools bootable USB

Next, connect the bootable USB drive to the PC experiencing the Blue Screen error, and reboot the PC from the USB by setting it as the boot device. To do this, restart your PC, press the F2, F8, F11, or Del key to enter BIOS, navigate to the Boot menu, set the USB as the primary boot drive, save the changes, and then restart your PC.

Step 3. Enable Partition Master with its Boot Repair feature, and open the "Blue Screen" tool.

When MiniTool Partition Wizard launches, go to the Toolkit section and click “Boot Repair”.

Next, click on "Blue Screen" and select the listed Blue Screen error to view its details. Alternatively, you can enter a specific blue screen code or description to search for the corresponding solution to fix it.

Step 4. Resolve Blue Screen Error

• Now, you can proceed with the solution guide to eliminate the respective BSOD or blue screen issue from your computer.
• If that doesn't work, you can also click on the "Live Chat" button to request remote assistance in resolving the issue with the aid of the technical support team.

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

If you prefer not to use third-party software, you can create a Windows installation CD or disk to address the unmountable boot volume issue. To begin, first boot your PC from the bootable CD or USB drive, and then in the Windows Setup window, select the "Repair Your Computer" option to access the "Choose an option" menu.

Fix 1: Run Automatic Repair

Step 1. From the menu, select "Troubleshoot > Advanced Options > Startup Repair".

Step 2. After that, choose the target operating system to repair. Windows will start the repair process and then restart.

Fix 2: Use SFC /SCANNOW to Repair System Files

Step 1. In the menu, click "Troubleshoot > Advanced Options > Command Prompt".

Step 2. In the command prompt, type sfc /scannow and press the Enter key.

Step 3. Restart your computer once the process is complete.

If you encounter the "Unmountable Boot Volume" error on Windows 11, please click the link below for more detailed information:

Solved: Unmountable Boot Volume in Windows 11

This article delves into the "Unmountable Boot Volume" issue in Windows 11. Discover the reasons behind it, troubleshooting methods, and solutions to恢复对系统的访问。

Fix 3: Run CHKDSK to Repair Boot Drive

Step 1. Open Command Prompt using the steps from Fix 2, type chkdsk /r c: and press "Enter".

Step 2. Type Y and press "Enter" when prompted to schedule the scan after a restart.

Step 3. Restart and let the check run. It might take some time.

Fix 4: Repair Master Boot Record (MBR)

Open Command Prompt, type the following commands and press Enter after each one:

Part 3. Recover Data When Unmountable Boot Volume Error Strikes

As mentioned earlier, if you have crucial files saved on the PC and urgently need to retrieve them, you can directly learn how to recover data from a non-booting PC. All you need is the Data Recovery Wizard Pro with Bootable Media tool. This tool is specifically designed for data recovery in cases of any system crash or booting issues. Use it to salvage your files when the hard disk is dead, damaged, or failed.

Conclusion

You have discovered 7 effective methods to resolve the unmountable boot volume issue. Feel free to try any of these solutions to fix the unmountable boot volume problem in Windows 10. Additionally, the video at the beginning provides an efficient way to address common blue screen errors; you can refer to the instructions in the video for guidance. If you have a more effective solution for solving the unmountable boot volume issue, please share it with us.

"Unmountable Bootable Volume" (People Also Ask)

Here are some frequently asked questions (FAQs) about an unmountable bootable volume: 1. What is an unmountable bootable volume? An unmountable bootable volume refers to a system disk or partition that the operating system cannot access or read properly, preventing the computer from starting up successfully. 2. Why does an unmountable bootable volume occur? This issue can arise due to various reasons, such as corrupted file system, bad sectors on the hard drive, incorrect disk configuration, virus attacks, or sudden system shutdowns. 3. How can I fix an unmountable bootable volume? You can try several troubleshooting steps, including booting into Safe Mode, running a disk check with Chkdsk, repairing the Master Boot Record (MBR), restoring from a system restore point, or using disk repair utilities like Windows' built-in Disk Utility or third-party tools. 4. Can data be recovered from an unmountable volume? Yes, often data can be recovered using specialized data recovery software, but it's essential to act quickly and avoid writing new data to the affected volume to minimize the risk of overwriting lost files. 5. Is it necessary to format the unmountable volume to resolve the issue? Formatting the volume may be required in certain cases, especially if other repair methods fail. However, formatting will erase all data on the disk, so it should be considered a last resort after attempting data recovery. 6. Can this issue happen on both HDD and SSD drives? Yes, unmountable bootable volume issues can occur on both hard disk drives (HDDs) and solid-state drives (SSDs) since the problem lies with the file system or boot sector and not the type of storage device. 7. How can I prevent such issues in the future? Regularly backing up your important data, keeping your system updated, using reliable antivirus software, and avoiding abrupt power-offs can help reduce the likelihood of encountering this problem.

1. What is the boot volume?

The boot volume refers to the disk partition that contains the Windows operating system files and the associated supporting files.

2. What causes an unmountable boot volume?

1. Corrupted system files
2. Disk errors
3. Damaged boot volume
4. Damaged RAM and more...

3. How do I fix an 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? To boot from a USB drive in Windows 10, follow these steps: 1. **Ensure USB Drive is Bootable**: First, make sure that your USB drive contains a bootable image, such as a Windows installation media or a system repair disk. 2. **Insert the USB Drive**: Plug the USB drive into your computer's USB port. 3. **Access BIOS/UEFI Settings**: Restart your computer and press the key to enter the BIOS or UEFI settings. The key varies depending on your computer manufacturer; it could be F2, F10, F12, ESC, or Del. Check your computer's documentation or screen prompts for the correct key. 4. **Change Boot Order**: In the BIOS/UEFI settings, locate the "Boot" or "Startup" menu. Here, you'll find the boot order options. Use the arrow keys to highlight the USB drive and move it to the top of the list. 5. **Save and Exit**: Press the key to save the changes (usually F10) and confirm that you want to exit and restart the computer. 6. **Boot from USB**: Your computer will now attempt to boot from the USB drive. If successful, the bootable media's menu should appear. 7. **Complete the Task**: Follow the on-screen instructions to proceed with the installation or system repair process. 8. **Revert Boot Order**: After you've finished using the USB drive, remember to return to the BIOS/UEFI settings and change the boot order back to your hard drive so your computer boots normally on the next startup.

1. Create an emergency disk using partition software tools. 2. Connect the bootable USB drive to a USB port on your computer. Power on or restart your PC. 3. Press F2, Del, or F8 to enter the BIOS settings. Change your computer's boot order to prioritize booting from Removable Devices or CD-ROM Drive before the Hard Drive. Press F10 to save the changes and exit.