-new- Acpi Msft0101 Driver 77 2021 Site

If you are seeing an "Unknown Device" with the hardware ID ACPI\MSFT0101 , installing this driver is mandatory for modern Windows security features.

If you have been ignoring that exclamation mark for years, now is the time to update. Just remember: after installing Driver 77, reboot twice. The first reboot finalizes the driver; the second allows the TPM to re-initialize its cryptographic state. -NEW- Acpi Msft0101 Driver 77 2021

The ACPI\MSFT0101 identifier corresponds to the or Intel Platform Trust Technology (PTT) . This is a security-related component found on modern motherboards (Skylake and newer) that provides: If you are seeing an "Unknown Device" with

Disclaimer: This article discusses a specific driver version. Always back up your BitLocker recovery keys before updating TPM-related drivers. The first reboot finalizes the driver; the second

Windows Update reinstalls an older driver automatically. Fix: Use wushowhide.diagcab (Microsoft’s tool) to hide the old driver update.

The 2021 update for the MSFT0101 driver focuses primarily on stability and security handshake optimizations rather than "speed."