I ordered Windows 7 from a popular online retailer, and received a very substantial discount on ESET Smart Security 4 for up to 3 computers as part of the deal. I have two questions. 1. Can I just download Smart Security 5, install that, and use the key from Smart Security 4 to activate (without having to upgrade?). Or, do I have to install SS4 and then do the upgrade thing. 2. The product is licensed for up to 3 computers, but after 1 year, when I renew, can I renew for just 1 computer, or do I have to renew for 3? I don't need 3.