Spybot Search & Destroy - Application to scan for spyware, adware, hijackers and other malicious software.
ThreatFire - Comprehensive protection against viruses, worms, trojans, spyware, rootkits, keyloggers & buffer overflows
ZoneAlarm - firewall detects, monitors, and prevents hackers from damaging your PC and stealing your identity.
Spyware Doctor - Spyware Doctor more information
Avast Virus Protection - Avast! 4 Home Edition is every bit as good as products you buy at the store. The only difference is the price - it's FREE!
Ad-Aware - This free program finds spyware and adware. These are little programs that advertising companies place on our computers.
