Under , ensure the Specification Version reads 2.0 . Conclusion
Microsoft does distribute TPM drivers, but only through . These are not found under "Optional Updates" as a standalone driver.
How to Fix the ACPI\MSFT0101 Driver Error: Download and Installation Guide
. This device is responsible for system security features like BitLocker encryption and secure boot. Recommended Fixes 1. Windows 10 and 11 Users Acpi Msft0101 Driver Download
The ACPI MSFT0101 driver is an essential pillar of your PC's modern hardware defense layout. Avoid third-party "driver download" websites that offer third-party executable files for this issue, as they often contain malware or adware. Instead, rely on enabling the chip in your BIOS, running Windows Update, or updating your official system chipset drivers to keep your machine secure and stable.
If you have enabled TPM in BIOS, installed the chipset drivers, and manually forced the INF file but the error persists, try these advanced solutions:
. If it remains "Unknown," you can try right-clicking the device in Device Manager and selecting "Update Driver". Windows 7 (64-bit) Under , ensure the Specification Version reads 2
When you see a yellow exclamation mark next to an "Unknown Device" with the hardware ID ACPI\MSFT0101 in Device Manager, it means your operating system cannot communicate with your motherboard's security chip. Why is the ACPI\MSFT0101 Driver Missing?
It manages BitLocker drive encryption, Windows Hello biometric logins, and secure boot operations.
: These versions have native support for TPM 2.0 and the ACPI\MSFT0101 device. Usually, no manual download is required as Windows Update identifies and installs the driver automatically. How to Fix the ACPI\MSFT0101 Driver Error: Download
Download the latest Intel Chipset Device Software and Intel Management Engine Consumer Driver . AMD Systems: Download the latest AMD Chipset Drivers .
BitLocker encryption refuses to enable, or Windows Hello PIN logins stop working. Method 1: Download via Windows Update (Recommended)