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Event ID 24625 — BitLocker Startup

Updated: December 16, 2008

Applies To: Windows Server 2008 R2


When a computer protected with BitLocker Drive Encryption is restarted, the early startup components perform a series of integrity checks and, if the system passes, attempts to retrieve the needed key information to unlock any BitLocker-protected volumes. Success depends on the availability of configured key protectors, such as the TPM or a user-supplied PIN, and the existence of volume metadata stored within the encrypted drive.

If Windows cannot unlock the Windows operating system volume, BitLocker enters recovery mode. If the user can supply a recovery password or insert a USB flash drive with a recovery key, BitLocker will unlock the volume.

After the Windows operating system volume has been successfully unlocked, BitLocker uses encrypted information stored in the volume metadata and Windows registry to unlock any data volumes configured for automatic unlocking.

Event Details

Product: Windows Operating System
ID: 24625
Source: Microsoft-Windows-BitLocker-Driver
Version: 6.1
Message: A valid key was found during the last restart.


This is a normal condition. No further action is required.

Related Management Information

BitLocker Startup

Core Security

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