***Please don't vote unless you've used at least two of the products listed, and therefore have a valid comparative opinion to offer. I'm using XP, and I've been using ZoneAlarm Free since it was first released. I don't remember for sure, but I guess that's around ten years. That's a long time to stick with a software program. I have never had a single problem with it in all these years. For much of that time ZoneAlarm was the best and for the most part only game in town for a free firewall product, but now things have changed. ZoneAlarm has never failed me, and it's easy to understand and use, but I see that other free products are offering better protection, so I'm considering a switch. So I'm looking for effectiveness, ease of use, and the least resource usage that I can get. If you've used two or more of these products, which one of these products would you recommend for me? Should I just stay with the tried and true ZoneAlarm, or should I move on to one of the others? Please share your knowledge and experience with these products. How do they compare in effectiveness, ease of use, resource usage, and tech support, including user community?