Motherboard type? Asus?
"ATK0110 ACPI utility"
try uinstalling it and then scan for new hardware and see if windows then recognises it.
If not then if you have a drivers disk with the machine, on Asus DVD, browse to "Bin" folder... then inside "ACPI" folder... and choose "Acpi" or "Acpi64" subfolder regarding you OS (32bit or 64bit)... then next... driver will be installed