Firewalls are often your first line of defense, but if you're using anything older than Windows 7, the default firewall just won't cut it. Even on Windows 7, the Microsoft firewall doesn't provide outbound protection. These tools will shore up your 'wall.
Comodo Internet Security merges Comodo's well-respected free firewall with its antivirus program. Though the AV is good, the firewall is better, and thankfully users can choose to install each component separately. It's eradicated most of its resource-hogging ways and gives users what they want: a flexible yet simple firewall that's great for beginners but also provides a smorgasbord of information and plenty of options for advanced users. Read full review