What ThreatFire Basic is and is not.

ThreatFire basic can identify and halt malware processes and activities, it does NOT remove them. For malware removal indentified by Threatfire you need to buy the pro version which costs $29.95. I personally tested ThreatFire on my infected virtual machine and was pretty satisfied with how it prevented the malware from doing [...]

ThreatFire - Free Protection Against Zero Day Threats

From the makers of one of the most trusted anti-spyware programs (spyware doctor) comes ThreatFire - a free zero day malware protection application.
What are Zero Day Threats?

Zero Day threats are malware applications that are so new that traditional anti-virus and anti-spyware isn’t able to detect them. Zero Day threats are obviously the most dangerous [...]