Comodo Firewall + Antivirus is a free security suite which allows users to have the protection of both a firewall and an antivirus. There are many options for advanced users, although it is also quite simple for beginners and entry-level users.
Comodo is currently available for 32-bit and 64-bit Windows users. However, you have to keep your attention on the installation to opt out of SafeSearch and toolbar options.

Released on January 28, 2010, the version 3 of the Comodo internet security suite allows you to install either just the AntiVirus or the Firewall. You can also choose to install both for optimum protection. They both protect your Windows PC from malware, worms, trojans, viruses and a whole lot more.

Version 3 has a hardened Windows XP 64-bit registry protection, so you have more protection. It also has a ‘learning’ function which lets it actually study your surfing and usage patterns to allow it to efficiently protect you from more threats.

Upon installation and probably some days after, the firewall would ask you about your Internet connections. It may be a bit annoying, but this is because it’ s still in the learning stage. When it passes that, you’ve got yourself a really strong firewall – without having to pay for anything.

If you’re annoyed by the pop-ups, you may have it to scan your system and authorize known applications. This would eliminate those pop-ups which constantly ask you about your system’s behavior.

The firewall generally runs quietly in the background as it does its job. It has a really nice white interface which is quite slick. It is also recognized by Windows Security Center, so you’ve got no problems about it.

Related Links:
Comodo Personal Firewall