Fix UNMOUNTABLE BOOT VOLUME error in Windows 10

Milan Stanojevic
by Milan Stanojevic
Deputy Editor
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Blue Screen of Death errors can cause all sorts of problems on your PC, and therefore it’s important that you know how to fix them. Many users reported UNMOUNTABLE BOOT VOLUME BSoD error, and today we’re going to show you how to fix it on Windows 10.


  1. Download the latest updates and update your drivers
  2. Run the Hardware Troubleshooter 
  3. Run the SFC scan
  4. Run DISM
  5. Use chkdsk scan
  6. Change the SATA Mode in BIOS
  7. Check your hardware

Fix – UNMOUNTABLE_BOOT_VOLUME Windows 10 error

Solution 1 – Download the latest updates and update your drivers

Blue Screen of Death errors are often caused by hardware or software issues, and in order to fix those issues it’s required that you update Windows 10. Downloading updates is pretty straightforward, and you can download the necessary updates simply by using Windows Update.

New updates are released frequently, and many of them offer security improvements and new features, but they also fix various bugs related to both hardware and software. If you want your PC to be safe and free from errors, we strongly suggest that you update Windows 10.

Downloading updates is important, but it’s also important that you keep your drivers up to date. Your hardware requires drivers in order to work with your PC, and if your drivers are out of date or buggy, you’ll encounter a BSoD error such as UNMOUNTABLE BOOT VOLUME. To fix these types of errors, it’s important that you keep your drivers up to date, and you can do that simply by visiting your hardware manufacturer’s website and downloading the latest drivers for your device.

Update drivers automatically

Searching for drivers on your own can be time-consuming. So, we advise you to use a tool that will do this for you automatically. Using an automatic driver updater will certainly save you from the hassle of searching for drivers manually, and it will always keep your system up to date with the latest drivers.

Tweakbit’s Driver Updater (approved by Microsoft and Norton Antivirus) will help you update drivers automatically and prevent PC damage caused by installing the wrong driver versions. After several tests, our team concluded that this is the best-automatized solution.

Here is a quick guide on how to use it:

  1. Download and install TweakBit Driver Updaterdriver updater starting window
  2. Once installed, the program will start scanning your PC for outdated drivers automatically. Driver Updater will check your installed driver versions against its cloud database of the latest versions and recommend proper updates. All you need to do is wait for the scan to complete.
    scanning proccess of Tweakbit driver updater
  3. Upon scan completion, you get a report on all problem drivers found on your PC. Review the list and see if you want to update each driver individually or all at once. To update one driver at a time, click the ‘Update driver’ link next to the driver name. Or simply click the ‘Update all’ button at the bottom to automatically install all recommended updates.
    Automatically Update complete
    Note: Some drivers need to be installed in multiple steps so you will have to hit the ‘Update’ button several times until all of its components are installed.

Solution 2  – Run the Hardware Troubleshooter 

If updating your drivers didn’t resolve the UNMOUNTABLE BOOT VOLUME error, we’ll try with a troubleshooting tool. Windows 10 features a handy built-in troubleshooter that can help you with various issues, including the BSOD errors. So, we can try it and see if we have any luck.

  1. Open the Settings app and go to Update & Security section.
  2. Select Troubleshoot from the menu on the left.
  3. Select BSOD from the right pane and click Run the screen troubleshooter
  4. Follow the instructions on the screen to complete the troubleshooter.

Solution 3 – Run the SFC scan

The SFC scan is a command-line tool that basically scans your computer for potential errors, and resolves them if the solution is available. Among other errors that the SFC scan can help with are the BSOD issues.

  1. Right-click on the Start Menu button, and open Command Prompt (Admin).
  2. Enter the following line and press Enter: sfc/scannow
  3. Wait until the process is done (it may take a while).
  4. If the solution is found, it will automatically be applied.
  5. Now, close the Command Prompt and restart your computer.

Solution 4 – Run DISM

DISM is yet another command-line troubleshooter that we can use if the previous ones failed to resolve the issue. In fact, DISM might be the msot powerful troubleshooter, because it freshly deploys the system image.

We’ll walk you through both standard and the procedure that utilizes the installation media below:

  • Standard way
  1. Right-click Start and open Command Prompt (Admin).
  2. Paste the following command and press Enter:
      • DISM /Online /Cleanup-Image /RestoreHealth
  3. Wait until the scan is finished.
  4. Restart your computer and try updating again.
  • With the Windows installation media
  1. Insert your Windows installation media.
  2. Right-click the Start menu and, from the menu, choose the Command Prompt (Admin).
  3. In the command line, type the following commands and press Enter after each:
    • dism /online /cleanup-image /scanhealth
    • dism /online /cleanup-image /restorehealth
  4. Now, type the following command and press Enter:
    • DISM /Online /Cleanup-Image /RestoreHealth /source:WIM:X:SourcesInstall.wim:1 /LimitAccess
  5. Make sure to change an X value with the letter of the mounted drive with Windows 10 installation.
  6. After the procedure is finished, restart your computer.

Solution 5 – Use chkdsk scan

Sometimes corrupted files on your hard drive can cause these types of errors to appear, but you can fix these errors by performing chkdsk scan. To perform this scan, follow these steps:

  1. Press Windows Key + X on your keyboard to open Power User Menu and select Command Prompt (Admin).
  2. When Command Prompt opens enter chkdsk /r c: and press Enter.
  3. Wait for the chkdsk scan to finish.

Some users are also recommending to use bootrec /fixmbr command before chkdsk, so you might want to try that as well.

If you cannot enter Windows 10 due to UNMOUNTABLE BOOT VOLUME error, you can perform the chkdsk scan be following these steps:

  1. Start Automatic Repair by restarting your computer few times during the boot sequence.
  2. Choose Troubleshoot > Advanced options > Command Prompt.
  3. When Command Prompt starts, enter the chkdsk /r c: and press Enter.

Alternatively, you can just connect that hard drive to a different computer and run the chkdsk scan. Just remember to replace C with the letter that matches your hard drive.

Solution 6 – Change the SATA Mode in BIOS

Sometimes UNMOUNTABLE BOOT VOLUME Blue Screen of Death error is caused by incorrect SATA Mode setting in BIOS, but you can easily change that. To change SATA Mode you need to enter BIOS first, and you can do that by pressing F2 or Del while your computer boots. Certain motherboards use different key, so you might want to check your motherboard manual and see how to access BIOS.

Once you enter BIOS you need to find SATA Mode setting. There should be several modes available such as IDE, RAID, AHCI, etc. Select any of these modes, save your changes and restart your PC. If the problem isn’t resolved, enter BIOS again and choose a different mode. If you cannot find SATA Mode setting, we advise you to check your motherboard manual for detailed instructions.

Solution 7 – Check your hardware

This error can be sometimes caused by faulty hardware, therefore we advise you to check if your hard drive and motherboard are working properly. If you made any changes to your PC and added new hardware, we strongly advise you to remove or replace the new hardware since it might not be fully compatible with your PC.

Also be sure to check for any loose cables connecting to your hard drive. If a certain cable is loose and not properly connected, that might cause this error to appear. If everything is connected properly, connect your hard drive to a different SATA port on your motherboard and check if that fixes this error.

UNMOUNTABLE BOOT VOLUME Blue Screen of Death error is one of more serious errors, and it’s usually caused by a hard drive problem, so be sure to try all solutions from our article.

Editor’s Note: This post was originally published in June 2016 and has been since completely revamped and updated for freshness, accuracy, and comprehensiveness.


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