Correct me if I'm wrong, but it sounds like everybody who has had problems with Norton is using the Internet Security software. I've used the Norton SystemWorks software ever since I got a computer in the mid 90's and haven't had a problem with a virus ever. It usually catches and deletes the viruses when they are downloaded. And I run the anti virus scan almost every night and it usually finds no infection. The software team that I use that keeps my computer clean is Norton SystemWorks, the free version of Zone Alarm as my firewall, and AdAware for spyware. If anyone is interested in a good way to protect their comp. that's what I'd recommend.
Unless the people that are having problems are using Norton SystemWorks already.