Export (0) Print
Expand All

Event ID 24606 — 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: 24606
Source: Microsoft-Windows-BitLocker-Driver
Version: 6.1
Message: No volume master key was retrieved from a recovery password during restart.


Use the correct recovery password

BitLocker entered recovery, and a user has successfully completed the recovery process. In order to unlock the Windows operating system volume during the recovery process, the correct recovery key must be provided on a USB flash drive or typed by the user at the recovery console.

Note: This condition may indicate simply that a user mistyped the recovery password or inserted the wrong USB flash drive. If the user subsequently provided the correct authenticator, no further actions are required. However, if the recovery process is required at every startup, continue with the following procedures.

If the correct recovery key or recovery password can be located, resume using it. If not, use the Manage BitLocker Keys wizard to duplicate the recovery password.

To perform this procedure, you must have membership in Administrators, or you must have been delegated the appropriate authority.

Duplicate the recovery password

To duplicate the recovery password:

  1. Click Start, and then click Control Panel.
  2. Click Security.
  3. Click BitLocker Drive Encryption.
  4. If the User Account Control dialog box appears, verify the proposed action is correct, and then click Continue.
  5. Click Manage BitLocker Keys for the encrypted volume.
  6. Click Duplicate the recovery password.
  7. Follow the prompts presented by the BitLocker wizard to create the desired keys or passwords.


To verify that BitLocker has started successfully:

  1. If the computer is not running, start the computer.
  2. If BitLocker has been configured to use a USB flash drive, insert the USB flash drive. If BitLocker has been configured to use a PIN, enter your PIN when prompted.
  3. Verify that Windows Welcome Screen, Logon Screen or Desktop appears. This indicates that BitLocker has correctly unlocked the Windows operating system volume.
  4. Log on to Windows and access any data volumes that are encrypted with BitLocker.

Note: Data volumes can be configured to be automatically unlocked or to require manual unlocking.

Related Management Information

BitLocker Startup

Core Security

Was this page helpful?
(1500 characters remaining)
Thank you for your feedback

Community Additions

© 2015 Microsoft