I've got a Dell Latitude D620 that I just recently re-installed Windows 7 on. The BitLocker wizard reports the following error when I open it.
A compatible Trusted Platform Module (TPM) Security Device must be present on this computer, but a TPM was not found...
When I open the TPM Administration snap-in, it reports:
Compatible Trusted Platform Module (TPM) cannot be found on this computer. Verify that this computer has a 1.2 TPM and it is turned on in the BIOS.
So far, I have done the following:
Verified TPM was turned ON in the BIOS
Verified TPM was ACTIVE in the BIOS
Verified TPM Driver was installed and appears in the Windows Device Manager and that it reported it was functional
Verified there are no additional devices in the Windows Device Manager that do not have drivers, or appear as non-functional
Uninstalled the TPM driver (Windows 7 default driver) and selected Delete the driver software for this device and re-installed the driver using the one from Dell.com
Used the CLEAR TPM settings option in the BIOS
Turned OFF the TPM in the BIOS, rebooted, and turned it ON again
Something odd I noticed is that the TPM device does not show up under Security devices in the Windows Device Manager, it shows up under System devices. I recall it it being under Security devices in the past, and a couple of Google results confirm it should appear there. Is there anything else I can try to get this working? BitLocker is a company requirement, so I really need to get this working.
Note: Before re-installing Windows 7, I had BitLocker enabled on this same PC without any issues. So, I know the TPM is compatible.