hello all.......... recently i discovered irc/backdoor sdbot on my p/c.and was able 2 perform o/s re-install thanks 2 the help i received from previous replies,thanks again......anyways the question is what would be the best p.f.w. 2 avoid another intrusion... i have since installed sygate pfw as well as norton a/v 2002........ is this sufficient with regular updates or should i invest in a more substantial system????????? thanks 4 you time and assistance.......