A screen of death is an error message on a computer or device that means something has gone wrong. It usually looks like a blue or grey page with a lot of text on it. It often takes a while for the computer to display this message, and it can also be difficult to understand what the problem is. Sometimes, the computer might even turn off or restart by itself. Screens of death often show up when the computer is trying to do a task but can't, because something is wrong. It can be a sign that a virus has infected the computer, or that something else is wrong and needs to be fixed.