I think Norton is awful, I used to think Mcafee was the worst until Norton crashed my PC. Norton uses way too much memory and it can't detect much. What those definitions are full of, I don't know....
I also use AVG antivirus and AVG antispyware free edition and I've been pretty happy with both. They finally updated the free version to version 7.5 and the interface is better looking than in 7.1
I like AVG because it uses almost no memory and it does a pretty decent job at finding stuff. I can't see spending like 80 bucks on an AV program when there are a lot of great free options. Also, grisoft makes great products and I can see why they've gotten popular the past few years.
Starmie214, Internet Explorer 7 is out now so you might want to try downloading it from Microsoft. It's a lot more secure and faster than IE6 and I've had no problems with it. I'd definitely ditch IE6, too many security issues with it. IE7 also has some nice features like extensions, tabs
and a phishing filter (this is especially nice if you think a website might not be legitimate or something).