Comodo is the best I've used and I've tried quite a few over the years. Just keep it up to date and do a weekly scan and you'll be grand.
Quote from Bob111:
http://personalfirewall.comodo.com/...73bb1ce5&key7sk1=3&key1sk1=ors&key1sk2=Google
comodo firewal+antivirus is not a bad combo.they are using slightly different approach,where user making the final decisions. imo worth to try. at least-if you don't like it-it won't ruin your PC during uninstall process. separate PC for browsing only + solid antivirus sitting on separate router is the way to go. at off course something like acronis for regular back ups