Windows 10: Unmountable boot volume - chkdsk /r does not solve issue

I would recommend to run MemTest86+

Run MemTest86+ - Test RAM - Windows 10 Forums



Note



MemTest86+ needs to be run for at least 8 complete passes for conclusive results. Set it running before you go to bed and leave it overnight. We're looking for zero errors here. Even a single error will indicate RAM failure.

Make a photo of the result and post it.

Addition:
If errors show up you can stop the test, remove all sticks but 1 and test this single stick in each slot for 8 passes or until errors show, switch sticks and repeat.
If errors show up and you see them a lot later, no problem, the errors don't affect the test.

 

Hi, I ran the memtest yesterday. Result:

 

Has the USB device been used before for pre environments?

 

Hi. Not sure if I understand the question but the USB device was formatted before I installed memtest. I also ran memtest with a different USB stick before I started this thread on the same computer. Then it only ran for 2 passes but did not show any errors then either.

The most important thing for me is to get some files I don't have backup for from the C: drive. Do you recommend any tools for this? I don't care if I need to reinstall windows and some applications.

 

You could try a live linux, I'm not sure if the WinPE with all preinstalled software is reliable enough due to all the errors.