Recommended free Firewall?

Can any one recommend A good free Firewall? I'v been having problem with my windows firewall. I'v tried Zone Alarm but it was non-compatible with my Avast Anti-Virus. Any recommendations would be greatly appreciated
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More about recommended free firewall
  1. The best free are:

    Comodo comes with HIPS & antivirus, but you have the option to not install them during install.
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