Comment Re:This may be a boon for people locked out. (Score 1) 69
It presents you multiple dialogue boxes when doing so and explains the importance of your key.
If you turn on Bitlocker manually, sure. Not if Device Encryption turns on automatically.
https://support.microsoft.com/...
it wouldn't work since apparently the OP's sister doesn't know her Microsoft password (in which case she can't provision the laptop in the first place).
Obviously she knew it at one time. The computer doesn't stop working when device encryption turns on. For the average user, the first time they realize it's even on is when it fails to unlock automatically due to an update / corruption and asks for the recovery key. This could be years later.