Antivirus??

>-----Original Message-----
>What would be a good antivirus software to use on xp
that would not use up
>very many resources like Norton does?
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i have found and i mybe wrong that all antivirus programs
only act after you recive the bug not before and a
firewall will not stop them i have two firewalls runing
but i still get bugs. they go after high speed modems.