I used the program and it said to used the ISO file and the rufus program did everything, but I don't know if it actually worked because I do not want to upgrade to windows 10 fully until all the kinks are worked out. I have W7 ultimate right now and it's the best. Has anyone ever used this program to do this before? Also, I used a sandisk flash drive, and I think I read somewhere saying they had problems being detected as removable media storage, that when they were plugged in they were read as if it was a normal hard drive. Could this have affected it at all?