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Comodo's Firewall is different from its class in that it passes all known leak tests to ensure the integrity of data entering and exiting your system is secured. Comodo has put our firewall through all kinds of sophisticated tests to ensure our firewall is powerful enough to ward off these attacks with default settings. No other firewall has had to work this hard but somehow I can't get this Freeware to work on my wife's Dell laptop...I'll go figure some more.

Comodo Personal Firewall secures your system against internal attacks such as Trojans, viruses, malicious software and external attacks by hackers. Safeguard your personal data though a simple user friendly single-click interface offering full immunity to attack. Comodo Personal Firewall helps you connect in a secure way to the internet and global networks.