A Trusted Platform Module (TPM) is not recognized on some Windows 7-based and Windows 8-based devices

Applies to: Windows 7 EnterpriseWindows 8 EnterpriseWindows 8.1 Enterprise More

Symptoms


On some Windows 7-based and Windows-8 based devices, a Trusted Platform Module (TPM) is not recognized as a compatible device and cannot be used for certain applications such as BitLocker Drive Encryption and Virtual Smart Card. Additionally, if you check the status of the TPM by using Windows TPM Management Console, you receive a "Compatible TPM cannot be found" message.

Also, you may experience the same behavior on some Windows-based devices when you perform an in-place upgrade from Windows 7 to Windows 8 or from Windows XP or Windows Vista to Windows 7.

Cause


This issue occurs because the TPM is using the OEM driver and not the Windows built-in Trusted Platform Module driver. 

Note When you open Device Manager on some devices, the TPM is listed under System Devices and not under Security Devices.

Resolution


To resolve this issue, open Device Manager on the device on which you are experiencing the issue, and then uninstall the Trusted Platform Module driver.

If you do a hardware scan, the TPM will be detected as a security device and will use the Microsoft driver. Additionally, the TPM will now be listed under Security Devices as "Trusted Platform Module 1.2."

More Information


For more information, go to the following Microsoft websites: