ACPI 2.0 error on Thinkpad

Symptoms

Users may encounter an unknown device with the hardware ID of ACPI MSFT0101 when installing Windows 7 32-bit on a ThinkPad. There is no 32-bit driver for this device and the installation will fail. If you switch to a 64-bit version of Windows 7, you can install the hotfix provided below.

Windows Event Log will show the following error:

ACPI 2.0 Error: [Firmware Bug]: BIOS _OSI( ) query did not return _OS Info

Applicable Brands

* ThinkPad

Applicable Systems

* 100-14IBD * 100-15IBD * 100S-14IBR * 110-17IKB * 110-14IBR * 110-15IBR * 110-15ACL * 110 Touch-15ACL * 110-17ACL

Solution

This device corresponds to the TPM. There are no standalone drivers for the TPM.

Use the following hotfix to resolve the issue when installing Windows 7 64-bit:

https://support.microsoft.com/en-us/topic/update-for-the-trusted-platform-module-tpm-for-windows-7-x64-editions-9337e58a-839f-e111-8a73-00155d556002