After installation, .

Visit the official Microsoft Update Catalog website. Search for KB2920188 .

100% safe, works on all versions of Windows 7, requires no downloads. Cons: Disables the TPM functionality entirely.

If you’ve just performed a clean install of Windows 7—or perhaps cloned a hard drive—you may have stumbled upon a frustrating entry in your Device Manager: an with the hardware ID ACPI\MSFT0101 .

Method 1: Install the Official Microsoft TPM 2.0 Hotfix (Recommended)

Method 1: Install Official Microsoft Patch KB2920188 (Recommended)

Before installing the ACPI MSFT0101 driver, ensure that you:

If you have already tried the Microsoft Hotfix, to get it working? Let me know so I can offer more tailored help.

This is not a hardware failure. It is a driver conflict caused by a specific security feature.