T500&Winxp pb : UNKNOWN SM BUS Controller

[RONY]

Hello,
I m trying to install win xp pro on my ThinkPad T500

"P8400(2.26GHz), 2GB RAM, 160GB 5400rpm HD, 15.4in 1280x800 LCD, Intel X4500HD, CDRW/DVDRW, Intel 802.11agn wireless, Vodafone WWAN, Bluetooth, Modem, 1Gb Ethernet, UltraNav, Secure chip, ..."

I installed all drivers but still have one in my device manager : "UNKNOWN SM BUS Controller"

I tried "Run Intel Driver Update Utility" but no way ...

Can anybody help me please ?

Thanks a lot

Rony