If you see this device with a yellow exclamation mark in your Device Manager, follow these steps to resolve it:
If your system has TPM 1.2 (common on pre-2016 machines), installing this driver will break your security stack. Also, if you have manually disabled TPM in your BIOS, this driver will hang at boot. -NEW- Acpi Msft0101 Driver 77 2021
The MSFT0101 driver is an essential system component that allows Windows to communicate with your computer's TPM chip. The TPM is responsible for: If you see this device with a yellow
If you see a yellow exclamation mark next to "Unknown Device" or "ACPI MSFT0101" in Device Manager, it usually means The TPM is responsible for: If you see
: The 2021 updates resolved common "Yellow Bang" errors (the yellow exclamation mark) in Device Manager where the TPM was listed as an "Unknown Device".
Are you currently seeing an or "Unknown Device" message for this ID in your Device Manager ?