i tried to download win 10 but it stopped after 4 minutes. i was told that 10 was incompatible with my Norton 360. i had black screen until i was able to get back to windows 7 premium home edition. Now i can only log on as a temporary user, i cannot get to my files. i feel that 10 corrupted my system and i cannot find the partially downloaded win 10 files to delete them. i called microsoft and they tried to help, finally the girl set up an appointment with someone more capable but they never kept the appt.