Hi, I am the prowd owner of a sp3. I would like to try windows10 on a virtual machine for testing purposes. If afterwords I find it suits my needs I would think about installing it in my sp3. My question is: how can I get an original copy for testing it, since I am the owner of a valid 8.1 key? Rgds. P.s. also, anyone can suggest a tested method he used for backing up the whole sp3 disk prior to win10 upgrade/fresh install? Rgds.