In my opinion, for probably 99% of all Windows users, the Windows firewall is perfectly adequate. I actually consider it one of the very few examples of good software engineering on Microsoft's part, which means they probably lifted it from one of the BSD operating systems. I'd guess FreeBSD, which Microsoft has been known to take networking code from in the past. All perfectly legal by the terms of the BSD license for anyone who might have some panty bunching going on.
Anyway, for the majority of people it's perfectly adequate. Some will claim it's lack of support for outbound filtering is a reason to get another firewall. I say that outbound filtering is vastly overrated. Firewalls are for keeping things OUT, not in. Besides, by the time outbound filtering is of any real use to you, you almost certainly already have the problem of a malware or virus infestation, so all it's really doing is performing something of an early warning system. Personally, I like to just prevent viruses and malware from ever getting on my system, not assuming that it is inevitable that I am hit by these things, and focusing my efforts on trapping and containing them.
Hi, Thank you for the previous replies. My computer emachine AMD Dempron 1.8 gh using XP desktop is starting to work better. I cleaned my computer as best as I could I had a problem in that I could not get the back off but the front popped off and I sprayed the computer with the air compressor I bought. I installed Avast, got rid of AVG 8.0.and I deleted my Jetico firewall. I also changed some of the start up programs. It only takes 5 min instead of 10 to boot up. My question is, do I need another firewall or is the firewall associated with XP sufficient. Any suggestions. Thanks again.