No virus, spyware, trojan or any other malware has been ever found since I installed CPF Version 220.127.116.11 for the first time on June 13 2006! The exception was that some files that I downloaded contained malware, because CPF did not prevent me from downloading any file. Presumably, CPF is designed to block any file from hackers in the Internet; it does not scan malware. So I wonder how successful programmers at Comodo develop a perfect CPF, for we all know that no software is bug free. Congratulations!
I check my computer with the following utilities below once or twice a week.
avast! Anti-virus 4.7
RemoveIT Pro XT2 – SE
ewido anti-spyware 4
SUPERAntiSpyware Free Edition
Spybot - Search & Destroy 1.4
Ad-Aware SE Personal 1.06
Microsoft Malicious Software Removal Tool
Before I installed CPF I used Sygate or Kerio firewall utility and it failed to block some malware as well as failed some leak tests.