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Configuring TPM to run in between Windows 8 -- Thinkpad General

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Started ‎02-20-2012 by
Modified ‎02-20-2012 by


Consider the following scenario where you try to install Windows 8 in a dual boot setting with Windows 7(With TPM enabled) .You may encounter with the follwing error message in the event log.


Title: BitLocker Drive Encryption

Headline: BitLocker could not be enabled.

Message: The BitLocker encryption key cannot be obtained from the Trusted Platform Module (TPM). C: was not encrypted.


In the System event log, you may see  the following events logged for this problem from BitLocker-Driver:


Event ID 24636: Bootmgr failed to obtain the BitLocker volume master key from the TPM.

Event ID 24641: An unexpected error was encountered attempting to retrieve the BitLocker volume master key during restart.



Event ID 24609: A key was not available from required sources during restart.



Thinkpad X220's running Preloaded Windows 7 with TPM enabled