SM Bus Controller driver not installed - Where can I find it?

Hello, I'm running Windows XP Pro on a MacBook Pro, but noticed a yellow exclamation mark in Device Manager on SM Bus Controller. Automatic re-installation and updating of the driver says "cannot find the necessary software." I've done a ton of forum searching here and there but have been unable to get this device operational. I've been trying to locate and install motherboard chipsets and appropriate drivers, but have been unsuccessful.

The Intel® Driver Update Utility gives the following message for a few categories: This device is unknown or unsupported. Please contact the manufacturer for possible updates.

Graphics Driver - SM Bus Controller
Audio Driver for Intel® Desktop Board
Wireless Networking
Wired Networking

At the moment I'm primarily concerned with the SM Bus Controller.

Any help in getting that exclamation mark off and things running smoothly would be much appreciated. Let me know what additional information might be helpful in diagnosing the problem and finding a solution.

Detected Chipset - Intel(R) GM965 Express Chipset
Memory Controller - 82GM965
I/O Controller - Intel(R) 82801HBM/HEM I/O controller hub (ICH8M) SATA Controller found in IDE mode
Integrated Graphics - Intel(R) 965GM Graphics And Memory Controller Hub(GMCH)

Motherboard:
Manufacturer Apple Inc.
Model Mac-F4238BC8
Version PVT
North Bridge - Intel GM965 Revision C0
South Bridge - Intel 82801HBM (ICH8-ME) Revision C0
CPU - Intel(R) Core(TM)2 Duo CPU T7700 @ 2.40GHz
Cpu Socket - Socket P (478)

Thanks again!

Message was edited by: GrandDreaming