There are (again) problems with the ZoneAlarm firewall discussed <!post=in this thread,376067>in this thread<!/post>. Since this is not the first time Loungers have discussed this topic, I thought I would save someone the trouble of searching out alternatives - since this forum is new and most of the discussions are found in the software forum. Feel free to add others I've missed!
Kerio Personal Firewall
Sygate Personal Firewall