Save and Exit. The "Unknown Device" will no longer appear in Windows. Troubleshooting Common Errors
If you see an "Unknown Device" with the hardware ID in your Windows 7 Device Manager, you are dealing with the Intel Platform Trust Technology (PTT) , which provides TPM 2.0 functionality. Acpi Msft0101 Driver Windows 7
Restart your PC and enter the (usually by pressing F2 , Del , or Esc ). Look for a menu labeled Security , Advanced , or Computing . Save and Exit
Find or TPM 2.0 Security and set it to Disabled . Restart your PC and enter the (usually by
The ID represents a security component integrated into Intel Skylake (6th Gen) and newer motherboards. It acts as a firmware-based Trusted Platform Module (TPM) .
: Locate the KB2920188 update. While Microsoft has retired some direct hotfix links, you can often find it archived on manufacturer support sites like the HP Community .
: If you recently updated from Windows 7 to a newer version and see this error, you may need to reinstall the chipset drivers or the Intel Management Engine Interface from your manufacturer's support page.