Open the Start menu, right-click Computer , and select Properties . Look under "System type" to see if you have a 64-bit (x64) or 32-bit (x86) operating system.
Microsoft released a hotfix specifically to address issues with TPM 2.0 on Windows 7.
Look for settings labeled TPM Support , Security Chip , PTT (Intel Platform Trust Technology), or fTPM (AMD firmware TPM). Change the Setting:
Disable TPM in BIOS to make the error disappear (if you don't need security features). acpi msft0101 driver windows 7 free
: Run the downloaded .msu file. Follow the prompts and restart your computer when finished. 3. Verify the Driver Installation After restarting, the device should no longer be "Unknown": Check Device Manager again.
While this method doesn't always install the TPM driver directly, it refreshes the ACPI bus enumeration, allowing Windows 7 to correctly identify the MSFT0101 device. In many cases, the system will then automatically fetch the correct driver from the Windows 7 driver cache.
ACPI\MSFT0101 device ID corresponds to the Trusted Platform Module (TPM) 2.0 Open the Start menu, right-click Computer , and
Right-click the (ACPI\MSFT0101) and select Update Driver Software . Choose Browse my computer for driver software .
However, you are in luck: this is typically not a sign of a hardware fault, but simply a compatibility quirk between newer systems and the older Windows 7 software. This guide provides a complete, free solution to help you resolve it.
: If you do not plan to use BitLocker or other TPM-dependent security features, you can disable the "Trusted Computing" or "TPM" setting in your BIOS/UEFI. This will remove the "Unknown Device" from your Device Manager. Ignore or Disable in Device Manager Look for settings labeled TPM Support , Security
The hardware ID ACPI\MSFT0101 refers to the Trusted Platform Module (TPM) 2.0
: This official update is generally not available for 32-bit versions of Windows 7. If you are using a 32-bit system, it's best to disable the device in the BIOS instead.
: Your system must be actively running in UEFI mode rather than Legacy/CSM BIOS mode for Windows 7 to properly initialize a TPM 2.0 module.