The complete overview of all steps

The “Unmountable Boot Volume” stop code in Windows 10 appears when your computer cannot read the HDD or SSD partition that Windows 10 is on. It is one of the many BSOD (Blue-Screen of Death) errors that you will eventually encounter while using a PC.

But the "Unmountable Boot Volume" stop code can be particularly tricky to deal with, since data corruption is often the cause of the problem. In almost all cases, a restart or hard reboot will do nothing to bypass the error.

If you are stuck in an "Unmountable Boot Volume" boot loop, you should use the Windows Recovery Environment (WinRE) to check and repair copies of corrupted data on your computer.