I've set a (short and simple) password on a Windows 10 user account. Immediately after setting it, I wanted to test it and logged out of the user account. The computer then didn't let me in anymore, even though I am 100% sure the password is exactly as I had set it just 20 seconds ago. Variations of the password also don't work (caps/num lock, other keyboards, etc).
After trying to remove the password via the registry from a bootable Windows USB stick, I noticed that the hard disk is encrypted with BitLocker (which I haven't set up though before). Inspecting the protectors manage-bde -protectors c: -get only returns the status "unknown", but the main drive (with the relevant registry) is not accessible anyway. There are no other user accounts on the machine.
What other options are there for restoring access to the computer? All options in the (blue) recovery menu (restore, etc) require a password as well. Ideally I'd like to keep the data of course.
