My stepfather downloaded the windows updates, one of which was the "Genuine Windows" download. He's been told he has got a pirate copy of windows. I suspect this is not true (we've all heard of the issue with the "Genuine Windows" update. He was offered more updates through the auto-updater, and they were installed. Windows required him to re-start, yet now the computer will not boot up. It goes to the black screen, tells us his processor type, and then nothing happens

Can anyone suggest what is wrong? If needed I can try to find more information, but it's difficult, as it refuses to do anything