You need to install the
Chipset driver from Fujitsu Support:
http://support.ts.fujitsu.com/Download/ShowFiles.asp
Click the + sign against Windows XP, then click "Windows XP" below that to see list of drivers.
Click the + sign against "Chipset", download the latest Intel chipset driver package (the first one at the top):
Intel®Chipset Software Installation Utility Production Version 8.3.0.1014_Kit11394
To download, click the "Download" bar on the right.