ThreatFire from PC Tools is a free anti-malware package. It can be used along with traditional antivirus software like (Avast) to provide excellent protection. ThreatFire uses a behavioral analysis technique to look for malicious behavior. Unlike other antivirus programs that use signatures or fingerprints it can detect so called “Zero Day” infections - malware that has not yet been “fingerprinted”. Run ThreatFire along with the new Avast 5 and you will be well protected.