I sold my old computer to a friend's friend. He never call me again. Some months latter I saw him and ask him how it was going. He told me that he had thrown it away because it was broken. When I asked him what the problem was, he told me that when he stopped typing for a while, the image on the screen started to melt and slip to the bottom, leaving a black space. If he touched the mouse or the keyboard, everything returned to normal. He was convinced I was sold him a defective machine and dumped the perfectly good computer. Apparently he haven't ever heard of screen savers, and I forgot to tell him I had installed one named
"Screen Melt FX."