Windows XP has a basic firewall built in. I use ZoneAlarm also, and they have a free version of their app. Visit
www.zonealarm.com - You can download the free version at this link...
Free Version and System scan.I used to use sygate long ago. It had many good features, but was always buggy on my win98. ZoneAlarm works great, but it's configuration is alien compared to Sygate. (especially the free version).
Plaz