I have an HP Envy x360 - m6-aq103dx running Windows 10 (installed when I bought the machine). About a week ago, I got an error after restarting with message:
Your PC ran into a problem and needs to restart. We'll restart for you.
For more information about this issue and possible fixes, visit https://www.windows.com/stopcode
If you call a support person, give them this info: Stop code UNMOUNTABLE BOOT VOLUME
I let the machine run through the automatic repair options, but after running overnight, I only had a black screen. Since I don't have the Windows 10 media, I went to the Microsoft site and made a USB of the Media Creation Tool. I booted from this and got to the command prompt and followed the steps at this link https://www.technipages.com/windows-10-fix-unmountable-boot-volume-error. These included chkdsk and and trying to fix the master boot record. All were unsuccessful.
I am currently booting from USB and running a live version of Ubuntu 18.04. I have been able to retrieve all of my files from the computer, so I don't have any issues if I need to wipe the hard drive and start over, but I'm hoping there is another fix.
Any help will be greatly appreciated! Thanks!