08/07/2021
Quick PSA: Bitlocker must be enabled by the user. It doesn't activate itself.
There has been an issue in the past few years where users have been getting asked for a Bitlocker key, but they never activated or installed Bitlocker themselves.
If you've ever used a work or school account on your computer, however, it's possible they had Bitlocker enabled. This would, in turn, activate it on your computer even if it's just to use Office 365 or other software.
Whichever account has it enabled will also have the key.
Unfortunately, there's nothing we can do on our end to access or recover the data without that key.