I am using inspiration 620, I upgraded my win 7 to wind 10.  After completed, the pc cannot boot to windows.  The screen shows computer error and it automatically rebooted again and again.  I try to restore it to factory image, but I don't have boot disk.  From bios, and press F 7 or F 8, there still no button for me to do that.  Anyone can advise what to do.