I'm going to be upgrading a laptop I use for church and community activities with an SSD soon and am wondering if I could simply download the version of Vista it uses to the new drive with just the Activation Key. I can't find the disc as it was years ago that I bought the computer and I really only use it for this non-personal stuff now and would like to not have to upgrade to a new version of Windows for that purpose if I don't have to.