Just want to post this to a public location in case anyone else has the same problem.
After watching a service tech spend hours looking for an unknown device identified as ACPI\WEC1000 to install XP on a used Lenovo M58p I was buying as a gift I finally told him to call it good – I’d look on my own or just disable the device as it seemed to make no difference to the operation.
That evening I did some looking and found someone asking about it on Lenovo’s forum. An answer was simply, this is the Winbond Trusted Platform Module. Unfortunately his link was old and missing.
However, I checked all of the drivers for the M58p (type 7483) and one of them is:
Winbond Trusted Platform Module (TPM) driver for Windows XP – ThinkCentre / ThinkStation … Learn more
At this time, the link for that driver is: