After my Windows 10 machine installed the latest seasonal update, it got stuck in a boot loop. It POSTs, but only got as far as the Dell loading screen - no Windows loading screen.
I swapped the OS drive into a another machine and found that the main partition had been encrypted with bitlocker. I did not set up bitlocker, nor was I prompted to set a password at any point, so now I have a drive that I cannot access unless I have a password which I was never asked to create. Any clue what happened and how I can recover?