Hi MrRobot, in reality I didn't change the system. I get it with windows 10, but after 6 months it did not work well. So I wanted to reset it and to install the new system (win 10). There was mistake, because the one who reset it, did like an android tablet ( I mean by combining volume up and that of power off). But it started till 64%. I already create Windows 10 installation media, but I can't install because the external Disk Rom is not recognized and I can enter in boot settings. If possible I can send you the video, so that you ca see well that is the reality. The product number is SN:(edit) your assistance will help me. Thank you so much.