You will find that only one firewall will work correctly. I tried that a while ago using Norton and Sygate firewalls. Sygate was the one that reacted first all the time, leaving Norton redundant.
You should be able to uninstall Norton AV without removing Internet Security.
You probably should uninstall Zone Alarm.
Some AV's will not install when there is already a product installed on your PC.
crunchie
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