sorry don't know what to say ....i am afraid i can't help you anymore.... i never had this problem before when i installed norton everything was just fine i just turned the windows firewall off.... ind i just tryed to open it right now and i have both of them running at this moment....just a test...so it is working.... did you installed any other antivirus with other firewall or other internet security settings? cause i just remembered that at some point i installed panda antivirus and because i did not stoped norton at that time they got into a huge fight LOL and it crashed my comp anytime i would restart...i could never figure it out to make them run in the same time.....