Eddy
2
He runs XP Pro with SP 1
He should start with making his system up-to-date and close a lot of security holes.
He runs XP Pro with SP 1, Zone Alarm (free), Avast 4.6 Home Edtn, Spybot, Ad-Aware and Microsoft AntiSpyware (Beta)
I'm missing HijackThis in the list.
I susggest he gets HijackThis and check with that also.
If it still shows nothing, it is safe to asume the system is clean.