IObit Security 360

Security 360 Free is an advanced malware & spyware removal utility that detects, removes the deepest infections, and protects your PC from various of potential spyware, adware, trojans, keyloggers, bots, worms, and hijackers. With the unique "Dual-Core" engine and the heuristic malware detection, Security 360 Free detects the most complex and deepest spyware and malware in a very fast and efficient way.

URL: http://www.iobit.com/security360.html

Microsoft Security Essentials

Microsoft Security Essentials provides free, real-time protection for your home PC that guards against viruses, spyware, and other malicious software.

URL: http://www.microsoft.com/security_essentials/

Symantec Security Response - Security Advisories

Security information of a time critical nature. Advisories contain information about major security developments, including Symantec's response to the situation.

URL: http://securityresponse.symantec.com/avcenter/security/Advisories.html

ThreatFire AntiVirus

ThreatFire features innovative real-time behavioral technology that provides powerful protection against both known and unknown viruses, worms, trojans, rootkits, buffer overflows, spyware, adware and other malware.

URL: http://www.threatfire.com/