-new- Acpi Msft0101 Driver 77 2021 Guide

Right-click the Windows Start button and select .

The packaging of this driver is often labeled "NEW" by update catalogs because it represents a fundamental shift away from the generic inbox driver (dated 2006). Version 77, released in the spring/summer of 2021, was a direct response to two major events: -NEW- Acpi Msft0101 Driver 77 2021

: An "Unknown Device" under Security Devices or System Devices showing hardware ID ACPI\MSFT0101 . Right-click the Windows Start button and select

: Press Win + R , type winver , and press Enter. : Press Win + R , type winver , and press Enter

Once the system has rebooted, open Device Manager again. The "Unknown Device" with the ACPI MSFT0101 ID should now be correctly recognized as a "Trusted Platform Module 2.0" or similar, and it will function properly.

Instead, the official fix comes in the form of a . This hotfix, which updates the Windows 7 driver database for TPM 2.0 devices, serves as the functional equivalent of a "driver" for the MSFT0101 device. It was released to add support for TPM 2.0 functionality on Windows 7 x64 (and Windows Server 2008 R2), and this remains the primary recommended solution from vendors like Dell and Lenovo.