When resetting a lost password i accidentally deleted the SAM file on my computer. Whenever i try to start my computer it is about to load the user login screen before the entire computer reboots and says there's a software or hardware issue(The one that appears if power was disrupted when windows was starting). Can anyone help with this??? I don't have a windows installation disk so i can't use the repair my computer option. Does anyone know how to fix this problem? Any help would be greatly appreciated.