Upgraded from Win 7 HM to Win 10, no problems. Ran file history, it completed. System image ran for 18 hours, never completed. Rolled the Toshiba laptop back to Win 7. Downloaded 10 again, same problem, file history completed OK. System image never completes. Tried 2 different 500gb external HDD's. I have 4 laptops and a desktop that all upgraded to Win 10 successfully. I have been able to successfully create File History and system images for each machine.