AIM Security Certificates:
Security Certificate Info
Free AIM Security Certificate
Make your own Certificate Buy Certificate from Verisign AIM Security FAQ's:
AIM Ad Hack's Security FAQ
AOL's AIM Security FAQ
Spyware Removal:
SpyBot-S&D
Ad-aware
Free Virus Scanners:
AVG Anti-Virus
AntiVir Personal Edition
Free Firewalls:
ZoneAlarm
Sygate Personal Firewall