Back in January Microsoft encrypted all my hard drives without saying anything. I was playing around with a dual boot yesterday and somehow aggravated Secureboot. So my C: panicked and required a 40 character key to unlock.
Your key is backed up to the Microsoft account associated with your install. Which is considerate to the hackers. (and saved me from a re-install) But if you’ve got an unactivated copy, local account, or don’t know your M$ account credentials, your boned.
Control Panel > System Security > Bitlocker Encryption.
BTW, I was aware that M$ was doing this and even made fun of the effected users. Karma.
Not that it helps now, but you can also dump your bitlocker recovery key through powershell and save it independently.
(Get-BitLockerVolume -MountPoint “C”).KeyProtector
The control panel dialogue allows you to do this as well. Control Panel > system security > Bitlocker encryption. But it also has the superior option which is to turn it off.
I didn’t loose any data BTW. I had my M$ account info, and a backup besides.