Unknown device ACPI\LEN0068

[mt420]

Installed a new T420 with Windows 7 Enterprise and loaded drivers from Lenovo support site

One Unknown device remains in Device Manager

Hope someone knows what device driver this refers to

[mt420]

It was the Power Management Driver (not Power Manager) and using Lenovo System Update for Windows 7/x64 solved it

[sideshowtodd]

Mine is fixed now too, thank you. I didn't see any other posts here and I just wanted to make sure you know your two were helpful to me. Thanks again, mt420.