i just purchased norton internet security 5 for my Mac last week and now all of a sudden, my antivirus is saying it is expired and requires an update. i thought the internet security inclued antivirus? i am sooo confused. i tried to uninstall the internet security, restart and reinstall it and it still said that my antivirus is out of date. do these products have to be purchased separately? please help before i go nuts!! :/