: These versions have native, built-in support for TPM 2.0. If it appears as "Unknown," it is likely due to a corrupted driver registration or a BIOS setting conflict.
: If you are using Windows 7 and do not need BitLocker, you can simply Disable this in the BIOS to remove the "Unknown Device" warning from Device Manager. 2. Install the Windows 7 Hotfix (KB2920188)
The cause of the missing driver varies depending on your version of Windows: acpi ven-msft amp-dev-0101
If you see this appearing as an "Unknown Device" in your Device Manager, it usually means the operating system is missing the necessary support files or the feature is disabled in a way that prevents proper initialization. Why is ACPI\MSFT0101 Showing as an Unknown Device?
Download the from an official archive or the Microsoft Update Catalog . : These versions have native, built-in support for TPM 2
: This older OS does not natively support TPM 2.0. Users often see this entry after installing Windows 7 on newer hardware (like Intel Skylake or later). Without a specific Microsoft hotfix, Windows 7 cannot identify the device. How to Fix the ACPI\MSFT0101 Driver Issue 1. Enable TPM/PTT in the BIOS
Restart your computer and enter the (usually by pressing F2, F10, or Del during boot). Download the from an official archive or the
If you are on Windows 7 64-bit, you must install a specific update to enable TPM 2.0 support.