Windows 10: Unmountable Boot Volume error During boot

I think I did something heinous to my computerI created a dword 32 bit value in HKLM/Software/Intel/GMM/ Something about editing VRAM, and set it to 1024 in decimal value, and now as NOT expected, my PC isn't booting Giving the error listedI have bitlocker on too, so everytime I have to try some troubleshooting method, first I have to type the recovery keyI don't know how can i fix this error, maybe if I could access my regedit.exe, or could disable my bitlocker on my computer without, opening my Windows at all?I tried cmds like bootrec /fixboot in the Windows Recovery Environment using an ins

:)

 

Unmountable Boot Volume

Unmountable boot volume usually means a bad hard drive. Booting the XP CD and running chkdsk will sometime bring the computer back to life for a while, but eventually the drive will die.

 

UNMOUNTABLE BOOT VOLUME error

Hi Andre,

The challenge that you're experiencing when you got the error, UNMOUNTABLE_BOOT_VOLUME,
is due to a damaged file system that failed to mount. It also means that sub-system in the machine failed to mount the boot volume. To isolate the issue, kindly answer the following questions:

• When did you first encounter the issue?
  
• What are the troubleshooting steps have you done so far?
• How did you upgrade the device to Windows 10?

You can also follow the steps that was shared by Michelle Her and
Billion Debbarma on these threads to troubleshoot the issue:

• Windows 10 Unmountable Boot Volume Error Message And Automatic Repair
• Unmountable_boot_volume -Windows 10
  

Hope this helps and let us know if it works.

 

How to fix error unmountable boot volume

Hi James,

It is possible that you received the error UNMOUNTABLE_BOOT_VOLUME due to a damaged file system which failed to mount. This error also means that sub-system on machine failed to mount the boot volume. To efficiently assist you, we'd like
to gather more information:

• Have you made any recent changes prior to this issue?
• What is the exact error message you received?
• What troubleshooting steps have you done so far?

Meanwhile, we suggest that you you follow the steps shared by Michelle Her and
Billion Debbarma on this threads below to troubleshoot your concern:

• Windows 10 Unmountable Boot Volume Error Message And Automatic Repair
• Unmountable_boot_volume -Windows 10
  

Keep us posted if you need additional help.