If you’ve encountered an "Unknown Device" in your Windows Device Manager with the hardware ID , you aren’t alone. This specific identifier is almost always linked to the Trusted Platform Module (TPM) , a critical security component required for features like BitLocker and secure boot.
If you want, tell me the exact Device Manager error code shown with ACPI\MSFT0101 and your Windows version (e.g., Windows 10 21H2 / Windows 11 22H2) and I’ll give tailored steps. -NEW- Acpi Msft0101 Driver 77 2021
In late 2021, Linux distributions also saw updates to handle this device ID, occasionally reporting a "Device or resource busy" error (-16) if the system's TPM was already claimed or misconfigured. Troubleshooting & "Unknown Device" Issues If you’ve encountered an "Unknown Device" in your
In 2021, this driver gained renewed importance due to the release of , which requires a TPM 2.0 module for installation. In late 2021, Linux distributions also saw updates
: If the driver fails to install or "Device cannot start (Code 10)" appears, ensure that TPM 2.0 or PTT (Intel) / fTPM (AMD) is enabled in your system's BIOS settings.
Powered by Trac 1.2.3
By Edgewall Software.