To resolve this issue for free, you can either install the official Microsoft patch or disable the device in your BIOS if you don't need its security features. Install the Microsoft Hotfix (KB2920188)
Verify you are running in UEFI mode, as the 32-bit version does not support this device. acpi msft0101 driver windows 7 free
The "Unknown Device" appears in your Device Manager because Windows 7 was released before the TPM 2.0 standard became common. Microsoft Support To resolve this issue for free, you can