-new- Acpi Msft0101 Driver 77 2021 Jun 2026

If the device is missing entirely, you may need to enter your BIOS and enable Intel PTT (Platform Trust Technology) or AMD fTPM .

: Some Linux and Windows logs may report "ACPI implementations are off-spec" for this device; if your system is stable and BitLocker is working, these warnings can usually be ignored. BitLocker Compatibility -NEW- Acpi Msft0101 Driver 77 2021

This driver enables the Trusted Platform Module (TPM) 2.0 , which provides hardware-based security for features like BitLocker drive encryption, Windows Hello biometric login, and Windows 11 system requirements . If the device is missing entirely, you may

or Windows 11's security requirements cannot properly communicate with the hardware. Key Features of the 2021 Update The Importance of the 2021 Driver Update Have questions

Ensuring only trusted software runs during the startup process. Device Guard: Protecting the system against malicious code. The Importance of the 2021 Driver Update

Have questions? Check your manufacturer’s support forum for “ACPI MSFT0101 Driver 77” – thousands of users have confirmed this fix. Backup your data before modifying TPM drivers.