
Insert Bootable USB Drive into the Computer and press the Power button to restart Computer.Īfter the computer restarts, click on Next > select Repair your computer option and navigate to Troubleshoot > Advanced options > Command prompt. Hence, follow the steps below to check and repair hard disk errors on your computer.įirst, use the Power button to power OFF computer. Unmountable Boot Volume Error can be caused due to hard disk errors. Make sure that you allow the Startup Repair tool to takes its own time and do not try to end or abort the process. Note: It can take a long time for the repair process to be completed. Follow the onscreen instructions to complete the Startup Repair process.

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Next, navigate to Troubleshoot > Advanced options > Startup Repair (or Automatic Repair).Ħ. Click on Next > Windows 10 or the operating system that is currently installed on your Computer.ĥ. On Windows Setup screen, select Language, Currency, Keyboard and click on the Next button.Ĥ. On the next screen, click on Repair your computer option located at the lower-left corner.ĥ. Insert Bootable USB Drive into the Computer and press Power button to restart your computer.ģ. Use the Power button to Power OFF the computer.Ģ.

Note: You may have to Enable USB Drive Boot option on your computer, if you are unable to access the computer using Bootable USB Drive.ġ. Perhaps the easiest way to fix Unmountable Boot Volume Error is to restart your computer using a Bootable USB Drive and try the Automatic Repair option that becomes available upon restart. If not, you can move to other methods as provided below. Hopefully, you will be surprised to see your computer back to normal. Leave the Computer on Black screen for about 3 to 4 hours.

Press the Power button to restart the computer and wait as the computer tries to fix the problem and ends up with a black screen.ģ. Use the Power button to shut down computer and allow it to cool down (15 to 30 minutes).Ģ. You can try these steps if you have the patience to wait for 3 to 4 hours or move to other methods to fix this problem.ġ. Restart Computer and Wait for 4 Hours!īelieve it or not, we personally witnessed a 7-year-old computer recovering from Unmountable Boot Volume Error, when it was restarted and allowed to stay on for about 4 hours.
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If you do not have a Bootable USB drive, you can create one right now by going to another computer and following the steps mentioned in this guide: How to Create Bootable USB Drive. The only way to gain access to your computer in this case is to restart your computer using a bootable USB Drive. If Windows is unable to fix the problem, you won’t be able to by-pass the Blue Screen of Death, even if you restart the computer multiple times. In many cases, Windows operating system manages to fix the problem by itself and you will find the computer working normally after restart.
