Signature-based antispyware

Source
"ThreatFire 3's ability to block installation of malware strictly by identifying bad behavior is phenomenal. It did a better (and faster) job than Norton AntiBot and even beat out Spy Sweeper, our current Editors' Choice for signature-based anti-spyware. This free tool is an excellent addition to your security arsenal." - www.pcmag.com, October 2, 2007
ThreatFire v.3.5.0
Windows® Vista™, XP, 2000 and 2003
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Comprehensive protection against viruses, worms, trojans, spyware, rootkits, keyloggers & buffer overflow
Real-time behavior-based malware detection
Immediately shut down destructive processes and quarantine malware
AntiVirus engine with signature updates to perform on-demand or scheduled scans of your entire PC for known threats
Automatic updates (when opted in to ThreatFire Community)
ThreatFire reporting and protection statistics
Malware quarantine & removal
Rootkit scanner - ability to schedule and customize
Advanced custom rules settings, fully configurable
System Activity Monitor - view instructive data about all running processes
Informative alerts provide guidance on how to proceed; most threats automatically quarantined
Personal and individual use allowed