I run Norton on a dozen plus PC's and laptops. Seems to work well and we have had no virus problems but most here are pretty careful about what they "click on", i.e., no unsolicited email attachments or advertisements. Pop-ups are blocked and we filter spam pretty tight as well.

There's no protection from "willingly" entering sites that are dangerous. Most all porn and "get rich quick" sites are trouble and should be avoided. I surf a lot of car type sites and have no problems, but I do stay away from those that Norton flags..