Acpi Msft0101 Driver — Windows 7

Do not waste hours on sketchy driver websites. Do not install unsigned drivers from unknown forums. Accept that Windows 7 was not built for TPM 2.0.

Some BIOS versions allow users to switch between "Discrete TPM" (a physical chip) and "Firmware TPM" (PTT). Acpi Msft0101 Driver Windows 7

Once installed, the "Unknown Device" disappears. Do not waste hours on sketchy driver websites

Alternatively, use Microsoft's troubleshooter to hide the specific "ACPI MSFT0101" driver offer if it appears. the "Unknown Device" disappears. Alternatively

Microsoft released a specific update to add support for TPM 2.0 to Windows 7 and Windows Server 2008 R2.