upgrade to SP1
ur drivers will be installed themselves.
this is little problem with 2000 and XP (no SP's) that they dont have support for USB 2.0 built in. therefore U have to upgrade your SP for XP.
or, you can go into BIOS, and then chnge the USB 2.0 (high-speed) to USB 1.1 (full speed, i beleve) - but this is generally not recommended, just for time being so that ur USB starts working.
or, you can search for drivers on internet. click search for best drivers while its seaching for drivers.
Intel Core2Quad 2.66Ghz 12MB L2-Cache
4096MB DDR Kingston Hyper-X
XFX 9600GT AlphaDog
Seagate 2 X 320GB SATA2
LG L246WH Flatron 24"