I loved Sygate PRO until it decided to cut my upload speed by 90% and couldn't delete it completely enough to freshly install it again so i went back to Zone Alarm PRO which is decent i guess but i miss the Sygate, maybe after a fresh XP install i'll throw it back on. had Nortons PF and i didnt like it much and it is heavy in CPU usage i felt. Never used Tiny but i am gonna consider it. XP built in firewall sucks because it doesn't alert you to whats leaving your PC, only blocks coming in so if you have a trojan or the like, goodluck.