If you have the BitLocker recovery key, you can unlock the BitLocker encrypted hard drive partition through the Control Panel. However, if your Windows OS is corrupted and you cannot boot into Windows ...

The FBI served Microsoft a warrant requesting encryption recovery keys to decrypt the hard drives of people involved in an alleged fraud case in Guam.

To fix the “Cannot install Windows, BitLocker Drive Encryption is enabled on selected partition” error, suspend BitLocker via Settings or Control Panel, or use your recovery key to unlock the drive.

Microsoft may give your encryption key to law enforcement upon valid request - here's how to keep it safe ...