i used Zone Alarm for 2 years but it caused me various problems , mainly making my computer run slow. i have had Ashampoo Firewall installed for a month now without any problems at all. would recommend it highly. you can get it here click here
Hi, I strongly recommend Kerio Personal Firewall. When you download/install Kerio you actually get the Full version for the first 30 days, after that you automatically revert to the Free Version, which is still very very good. I liked it so much (after having always used ZA) that I purchased the full version.