Intel® Desktop Boards that include the Trusted Platform Module (TPM) feature can display a yellow exclamation mark on an Unknown Device in Device Manager. This error occurs even if TPM is disabled in the BIOS.
To eliminate the Unknown Device in Device Manager, install the TPM drivers. The TPM software/driver can be installed from either the TPM CD that came with the desktop board, or from the Download Center. Follow these steps:
Install the TPM drivers.
- Enable TPM in the BIOS:
- During boot, enter the BIOS setup by pressing F2.
- Go to Advanced > Peripheral configuration.
- Enable the Trusted Platform Module.
- Press F10 to save and exit.
After installing the drivers, you can disable TPM in the BIOS if you wish.
The installation of the TPM software places a Security Platform icon in the Windows* Quick Launch bar, and can display this message when you boot the computer: Security Platform is not initialized. You haven’t initialized your Security Platform.
To eliminate this message, disable the Security Platform software in the Quick Launch:
- Click Start > Run.
- Type MSCONFIG and click OK.
- On the General tab, click Selective Startup.
- On the Services tab, clear the check boxes for Security Platform Management Service and Trusted Platform Core Service.
- On the Startup tab, clear the check boxes for SpTNA and PSDrt.
- Click Apply > Close.
- Restart the computer.
This applies to: