If your son runs any P2P file sharing programs (Limewair, Kazaa, etc.), those are notorious for allowing nasties into the computer. In addition spying and damaging the software installation, they can run in the background and slow things.
Windows XP computers should have at most one firewall and one antivirus program, and at least 2 different antispyware programs. Keep definitions updated, and scan regularly.
Some free software:
Windows Defender antispyware
Spybot Search & Destroy antispyware
Tips on faster starts:
My sons laptop (Compaq Presario V2000) has been running very slow and freezing up alot lately. I cleared the history, cookies and delete files on the internet options. I also ran clean disk and gefraged the computer. Still slow.
Can anybody help with this problem? Also, can someone tell me what I can shut off on the system tray and prevent it from running at start-up? It would be greatly appreciated.