i dont reccomend using sysmantec, i used it last year but it was the worst anti virus ever.
it couldn't delete or clean some viruses away from the computer
Kaspersky, really the best you can get IMO.
Tracks your network and automatically blocks anything potentionally dangerous. And i was able to hide my ip and make it look like i was in a different state aha.
CA antivirus hasnt gone wrong yet also i run with 3 firewalls
its a little on the expensive side to some people, and i also got the NoD 32 antivirus i run