Hi All. I have a win8.1 pc with a second disk which I would like to use for win10. I have the disk setup and loaded with win10 files. My question is: If I run setup from my 8.1 screen, will I be upgrading my 8.1 and not installing win10 on the new disk? If that is the case, how can I install win10 on the new disk without removing my existing win8.1?