Users that have a Microsoft Account can recover their BitLocker encryption key online too. Say you’re walking through an airport and need to step through a security checkpoint.

Microsoft may have your encryption key; here’s how to take it back ... Device encryption is a simplified version of the BitLocker drive encryption that made its debut in Windows Vista in 2006.

This key is 48 digits long and can be found in whichever source you used to activate BitLocker. It may be found on a printout, a USB flash drive, or the Microsoft account used to activate BitLocker.

Users can also reboot impacted systems using USB media, and the company advises keeping a printed copy of the key. For Windows 10 users, the problematic update is called OS Build 19045.4651 ...