Prior to 2021, many users—especially those with systems—experienced a persistent issue:
If you see a yellow exclamation mark for ACPI\MSFT0101 in your Device Manager, follow these steps: What is the ACPI\MSFT0101 Device? - DriverIdentifier
Microsoft packages core ACPI infrastructure drivers directly into their operating system updates. Press the to open the Settings menu. Select Update & Security (or Windows Update on Windows 11). Click Check for updates . -NEW- Acpi Msft0101 Driver 77 2021
: These versions do not natively support TPM 2.0. You must install a specific Microsoft hotfix (KB2920188) to recognize the device. 2. How to Install or Fix the Driver Follow these steps to resolve the missing ACPI\MSFT0101 Method A: Windows Update (Recommended)
: PIN or fingerprint logins suddenly stop working, forcing you to use your account password. Select Update & Security (or Windows Update on Windows 11)
Understanding the ACPI MSFT0101 Driver (2021 Update) The device ID corresponds directly to the Trusted Platform Module (TPM) 2.0 security processor. This hardware component is embedded on modern computer motherboards. It provides hardware-based, security-related functions.
Sometimes, the driver is correct but has a corrupted configuration. A clean reinstall can fix this. You must install a specific Microsoft hotfix (KB2920188)
Follow your manufacturer's specific guidelines closely to flash the BIOS via a USB drive or dedicated desktop utility. Note: Ensure your power source is completely stable during this process. Conclusion