I've never had to do anything to AVG after installing except that once a week I will manually check for updates. AVG still finds things my ISP (speakeasy.net) doesn't sometimes. I don't know what they run, though. I do get the same notice from speakeasy at least once a week about an email with a virus from someone I don't know and they block delivery of it.
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Dave Clark Georgetown, Texas MK2A 42Gb - AnoFace - Smoke Lens - Dead Tuner - Sirius Radio on AUX