For those worried about GoZilla, former Aureate spyware, and all that jazz, Zone Labs have a FREE Firewall for download that monitors all that stuff. Steve Gibson at GRC.com has a tool that can remove spyware from your computer. A note about Napster. You don't have to make any folders available for sharing. You can be as selfish as you wish!
The Zone Labs firewall blocks my computer connecting to the Go'Zilla advert sites. I'm happy enough with with it all. Get GRC to do a port probe on you, and see what you have visible to the cyber world.
Safe Surfing!!