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.
https://en.wikipedia.org/wiki/Microsoft_Recall
Basically takes screenshots and stores them, then scans them and makes the text searchable. There’s been a bit of controversy over it lately and how it deals with PII/PHI.
https://www.tomshardware.com/software/windows/microsoft-recall-screenshots-credit-cards-and-social-security-numbers-even-with-the-sensitive-information-filter-enabled