When I turned the computer on this morning, it was flickering between white and black on the display.
I am not sure what is causing this. But I guess it is Windows 10 rather than hardware.
This could not have come at a more opportune time. So I am thinking about installing Windows 7 so I qualify for the free upgrade.
I was running the Win 10 "try it and see" system, but had minor problems so I went back to Win 7 and like you await the free upgrade. Good luck in the future.