How to choose a free Firewall for free virus

I don't know what to do, I had free Kaspersky anti-virus eventually bought the paid Kaspersky internet security there is a firewall on the year to go somewhere a little more than half a year will end when you want to stay free of the virus but what to do with tried comodo firewall but not very much loading system, and someone wrote that already incompatible with kaspersky free 2017 and don't know what to put thought Jetico Personal Firewall but. it is no longer supported for updates against new threats may make a blunder and braehmer of windoms don't want what would you recommend ?