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No TPM error RRS feed

  • Question

  • I'm trying to encrypt a Hyper-V VM running windows 8.1 with bitlocker. Since the VM doesn't have access to a TPM, I've followed the usual route of:

    • Run gpedit.msc
    • Navigate to "Computer configuration" > "Administrative templates" > "Windows Components" > "Bitlocker Drive Encryption" > "Operating System Drives"
    • Open "Require additional authentication at startup" and select "Enabled" and tick "Allow bitlocker without a compatible TPM"
    • Run gpupdate.exe /force
    • reboot the VM

    Now if I try to enable bitlocker via manage-bde, I get this error:

    Volume C: [OSDisk]
    [OS Volume]
    ERROR: An error occurred (code 0x8028400f):
    A compatible Trusted Platform Module (TPM) Security Device cannot be found on this computer.

    If I try to enable bitlocker via the GUI, I get the following error.

    This device can't use a Trusted Platform Module. Your administrator must set the "Allow BitLocker without a compatible TPM" option in the "Require additional authentication at startup" policy for OS volumes.

    Even though I've done just that. 

    Please help!

    Thursday, January 9, 2014 12:55 PM