BitLocker is a Windows feature that uses encryption to protect data from unauthorized access. BitLocker recovery is the process of restoring access to a BitLocker-protected drive if the drive cant be unlocked normally. Here are some key points about BitLocker recovery:

• Causes of BitLocker recovery: BitLocker recovery can be caused by various factors, such as hardware, firmware, or software changes that BitLocker cannot distinguish from a possible attack, or an attacker modifying the computer by obtaining physical access.

• Recovery options: In a BitLocker recovery scenario, there are several options available to restore access to the drive, such as using a recovery password, a recovery key, or a backup of the key.

• Recovery key: A BitLocker recovery key is a unique 48-digit numerical password that can be used to unlock a BitLocker-protected drive if BitLocker is otherwise unable to confirm for certain that the attempt to access the system drive is authorized. The recovery key can be found in several places, such as a printout or a USB flash drive.

• Preventing BitLocker recovery: Before beginning recovery, it is recommended to determine what caused recovery. This might help prevent the problem from occurring again in the future. For example, if it is determined that an attacker has modified the computer by obtaining physical access, new security policies can be created for tracking who has physical presence.

Overall, BitLocker recovery is an important process to restore access to a BitLocker-protected drive in case of unexpected events.