-new- Acpi Msft0101 Driver 77 2021 |link| Jun 2026

: The core chipset drivers responsible for communicating with the security processor are corrupted.

The ACPI MSFT0101 driver is your system's key to hardware-level security through TPM 2.0. While it works seamlessly on Windows 10 and 11, its primary source of user frustration stems from running outdated or incompatible operating systems like Windows 7 or 8.1.

Solution: Right-click and choose , then restart your computer to force a re-detection. -NEW- Acpi Msft0101 Driver 77 2021

under "Other Devices" or with an error under "Security Devices". Recommended Resolution: Automatic Updates:

Follow these troubleshooting steps in sequence to repair the driver stack. 1. Enable TPM 2.0 in the Motherboard BIOS/UEFI : The core chipset drivers responsible for communicating

If you are seeing an yellow exclamation mark in Device Manager labeled "Unknown Device" or "ACPI\MSFT0101," it indicates a missing or corrupted driver, which can prevent you from activating advanced security features.

The Acpi Msft0101 driver is a software component designed to facilitate communication between your computer's operating system and its hardware devices. Specifically, it's an ACPI (Advanced Configuration and Power Interface) driver, which plays a crucial role in managing power consumption, temperature, and other system settings. Solution: Right-click and choose , then restart your

: Helps the Windows ACPI driver (Acpi.sys) manage power consumption and wake-up events. How to Install or Update the -NEW- 2021 Driver

: Ensuring stable TPM 2.0 support, which is a hard requirement for the Windows 11 operating system.

Furthermore, some users reported that after installing Driver 77, they were prompted to clear the TPM. If you use BitLocker or have saved passwords in the TPM, BACK UP YOUR RECOVERY KEY before updating.