-new- Acpi Msft0101 Driver 77 2021 _best_ Jun 2026

In a concerning incident from 2022 that highlights the potential for driver mismanagement, a driver automation tool mistakenly pushed a driver for the ACPI MSFT0101 device that was not intended for it. This incorrect driver was reported to cause serious system issues, such as black screens on wake from sleep and excessive battery drain. This is a powerful reminder to:

When Device Manager marks this with an error, it typically indicates:

Before trying to install a driver, you must ensure the technology is active. your computer. Enter the BIOS/UEFI setup (usually F2, F12, Del, or Esc). Navigate to the Security or Advanced tab.

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: It ensures that the boot software has not been altered by malware.

: The solutions differ for 32-bit (x86) and 64-bit (x64) Windows 7.

Powering secure biometric logins, such as facial recognition or fingerprint scanning. In a concerning incident from 2022 that highlights

Windows Update sometimes reverts to an older driver. Use the “Show or hide updates” troubleshooter from Microsoft to block the old driver and keep version 77.

Which are you currently running?

BitLocker may fail to automatically unlock your primary operating system drive during startup. This forces users to manually input long recovery keys on every single boot cycle. How to Install and Update the Driver your computer

Like Windows 7, Windows 8.1 does not natively support TPM 2.0. Users would need to apply a similar update (support for TPM 2.0 in Windows 8.1) or disable the TPM in the BIOS.

If you're a user encountering this:

If you are seeing an uninstalled device in your Windows Device Manager labeled (often listed as "Unknown Device" or "Trusted Platform Module 2.0"), it means your operating system is missing the necessary driver to communicate with your computer's security hardware.