Other Devices->Universal Serial Bus(USB) Controler

I have dual boot machine,XP and W2000.
After installing Windows 2000 Server and SP4 on my D800,
I found in Device Manager->Other Devices three entries that required drivers:

Base System Device
PCI Devices
Universal Serial Bus(USB) Controler
(I tried to remove USB Root Hub in safe mode,
Windows find them again, but the entry under
Other Devices->Universal Serial Bus(USB) Controler stays the same)

What drivers do I need ?
Where can I get them?

Any help is greatly appreciated.