A Few Must Haves...

Hip Resumes
Windows® Defender
Firewall Zonealarm.com
Free Anti-Virus from McAffe
Free SpyBot Software
Free Ad-aware Software
Free SpySweeper
Get Google Tool Bar 
WinTasks Process Library
Windows Startup List 
Startup Items List  
Windows 2000 Services
Java for Windows XP?
Task List
One Computer Guy           
SpyKiller
Sasser Worm XP and 2000
Remove Windows Messenger in Windows XP
Microsoft® Windows AntiSpyware
Microsoft® Windows® Malicious Software Removal