Which Firewall can I install with Avast Home 4.8?

Sorry I’m new with this. I have Avast home installed and I want to add a Firewall. Which one do I choose??

I have copies of last versions of COMODO and OnlineArmour.

Please give some tips of installation. I want no headaches doing this!

Thank you very much!

http://forum.avast.com/index.php?topic=35431.0

I’m using Comodo, and I have no problem at all.