For the past several years, I have automatically renewed my Norton Antivirus Subscription over the internet. I have never had a problem downloading it before. Tonight I tried to download Norton Antivirus 2012 to my computer, and I received a message saying I couldn't complete the download because I didn't have the right system requirements. I have Windows Vista. The version I have been using is Norton Antivirus Classic 2011. I didn't see where there is a 2012 Classic version. What should I do?