This is a free program to protect your computer from Trojan viruses / malicious software and external attacks by hackers.The software is well known for its simple user friendly single click interface offering full immunity to attack which allows users to connect to Internet safely and securely and this also allows protect your system from unknown threats.Comodo Firewall Pro is into the market with its latest third version with a great changes from its previous versions.Its simplicity towards armature users makes it special.The latest version of the comodo include support for Windows Vista and also windows 2000.New feature like "Host Intrusion Prevention System" protects your system from unknown threats and remember Comodo offers all these services for free get your latest edition of Comodo Firewall Pro Now.