Malware and untrusted files get nowhere near anything important AND you get to use your computer without interruption from nagging alerts. This ground-breaking method of protecting your PC means that only trusted applications are allowed to run.

Under default settings, unknown and untrusted files are automatically scanned by cloud-based virus scanners then, while the file undergoes behavior analysis on a cloud server, it is run in a virtual environment (sandbox) on your local machine so that it cannot modify or affect data on your 'real' system. The latest version sees a major leap forward in security and usability with the addition of cloud-based scanning and behavior analysis of unrecognized files - making Comodo Free Firewall unbeatable at detecting zero-day attacks. If not, the tool will alert you that a possibly malicious file is trying to enter your PC. If the file asking for access is on the list, the product can be sure it's safe for your computer to allow it to execute. Whenever an unknown piece of software is introduced to your system, the software cross-references it with a white-list of over 15 million trusted files and applications. Comodo's Firewall uses Default Deny Protection to prevent threats from occurring, rather than just detecting them when it's already too late. Comodo's Free Firewall is your first layer of defense against viruses, worms, Trojans, hackers, and all Internet threats.

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