A few days ago I had to force-shutdown my laptop (HP ENVY Dv6) because it froze, and after restarting it it showed a screen with the hp logo, and under it "Preparing Automatic Repair". After a few seconds the BSoD appeared, at 0% (showed it for about a 1/10th of a second) and turned black. Then it shows on the bottom left corner "Press the ESC key for Startup Menu", then goes on again, showing the logo, "Preparing Automatic Repair", BSoD, repeat, forever.
I'm fully prepared to factory reset the PC in worst case scenario. I have a Recovery USB which I have created from another laptop after this problem emerged. I tried booting with it, and when I selected "Refresh PC" it says "The drive where Windows is installed is locked. Unlock the drive and try again.", and when I selected "Reset PC" it says "Unable to reset your PC. A required drive partition is missing." I do not have any Restore points or images for recovery, unfortunately. Selecting "Automatic Repair" makes it attempt, but shortly after it says that the repair failed, and gives me two options to Shut down PC, or go back to troubleshooting options. I can open the Command Prompt using this, I don't know if that can be of any help though.