Ken didn't like his computer, and perhaps his computer didn't like him either! If Ken used it for longer than an hour it made a strange zzzzz noise. Then the monitor started to flicker: on, off, on, off. Some programmes did not run on the computer, even simple ones. The computer hid files from Ken. Or sometimes files didn't open. Worse, the computer suddenly deleted files. Ken's father took it to a repair shop again and again. Nothing was wrong, the shop always said.