Unable to Enable Bitlocker with TPM

I'm having problems initializing BitLocker on Windows 7 Enterprise X64 on some Dell Latitude Laptops (Broadcom TPM 1.2).
I'm using the build in Windows drivers as recommended and the latest BIOS version from Dell.
I can initialize the TPM/set the owner password but Bitlocker always throws this error at the Initializing Drive section:
Access Denied
I though that maybe I had configured group policy incorrectly so I've rebuild one of the laptops off the domain/left all the default settings but I still have this issue.
I can encrypt external drivers on the same laptop when not using TPM.
Is there any way to proceed from here/does BitLocker log anywhere else?
Many thanks.

Hi,
To troubleshoot the issue, please perform the following steps.
1. Modify the “Choose how BitLocker-protected operating system drives can be recovered” policy is disabled. You can locate the policy under the following
path.
Computer Configuration\Administrative Templates\Windows Components\BitLocker Drive Encryption\Operating System Drives
2. Assure the current user profile has administrator privilege to turn on BitLocker and modify group policy. If the issue persists, please create a new admin user
account for a test.
3. If the machine is built by SCCM, please refer to the following article:
Access
Denied Error 0x80070005 message when initializing TPM for Bitlocker
Thanks,
Novak

Similar Messages

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    TpmReady            : True
    ManufacturerId      : 1229346816
    ManufacturerVersion : 5.0
    ManagedAuthLevel    : Full
    OwnerAuth           : u2uAKH0Sr+d98s+oGXLLU8DHUuc=
    OwnerClearDisabled  : True
    AutoProvisioning    : Enabled
    LockedOut           : False
    SelfTest            : {}

    Hi Paddy,
    "1. How many bad password attempts do I get with TPM by default before lockout?"
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