PC Tools, maker of the popular Spyware Doctor utility, acquired Novatix's Cyberhawk this past May. The company has now thoroughly incorporated Cyberhawk's behavior-based malware detection technology into a new product, PC Tools ThreatFire 3. TF3's ActiveDefense technology detects malicious software entirely based on its behavior, so it can block threats that are too new for signature-based scanners to handle. No configuration is required, so it's a snap to use. And unlike Symantec's Norton AntiBot (NAB), which costs $30, ThreatFire is free.

Well its main punch lies in the fact that like avg its not a resource hog and does not detects eveything as virus or trojan ,also it features behaviour based protection which are very useful in case of zero day attacks,so if you dont want to shell out anymoney on paid antiviruses then its want you want.

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