Comodo Firewall Pro Free is complete protection from hackers, spyware, trojans, computer crashes, and identity theft. It provieds defense agains one of the most serious and common attacks on the internet, the buffer overflow attack. Buffer overflow attacks are often used by ID stealing thieves to deliberately cause the buffer overflow to crash a computer which creates the opportunity for the hacker to then run malicious code and even gain control of the entire operating system. The clean pc mode registers your current applications then will allow only applications that you approve to be installed on your computer. Comodo is labeled Pro but it offers up its dragon-sized treasure of features for free. Learn more about Comodo Firewall Pro and Download it from this page to try it out.