I downloaded avast!, the free antivirus software for my computer, and pretty much made Norton 360 kick the bucket on my computer. (CELEBRATION) One thing though, when I look at the summary, it says: "Your protection against viruses and spyware will expire in 30 days. You need to register the program to stay protected." What the hell? I thought this was a free antivirus! Is registering for it free? What do I need to know about registering for avast?