Here's my situation: I have a machine with a retail version of Win 7 Pro 64bit... I have the retail install key along with the disk. I am going to be doing a brand new build this week. I was under the impression that all I would need to do is download Win 10 onto a thumb drive and boot the new machine and install. After reading several posts it appears that I need to do a fresh install of Win 7 and then upgrade to 10??? Is there anyway to do a clean install of 10 on a brand new machine without installing 7 first? Any help would be appreciated!