I tried: PC Tools, Comodo, Outpost, and ZoneAlarm
And this is my conclusion:
ALL of them were a waste of time, resources and junk in my laptop (With the exception on ZA latest version, was the less bad. But its predecessor was a horrible experience). Having compatibility and connections problems, of course, and slowdowns in the connection speed. And the worst of all, I could not connect to my printer.
Arrrg! finally, I prefer Windows Firewall. WF does the same job as the other ones, but better. And if you have the knowledge using WF Advance settings, is better than whatever other third firewall.
Don't fall in a fake review or opinions of any firewall from anyone on the Internet. Remember; they were written in their experience and NOT in yours. In my case, they (FW mentioned above) was my experience.