Comodo Internet Security merges Comodo's well-respected free firewall with its antivirus program. While 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.

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