This is a good prank for anyone really. Or at least anyone who knows a blue screen is a bad thing with computers.
Step 1: Get the Screen
To get a blue screen of death all you have to do is google "blue screen of death" and download it to your computer.
Step 2: Change the Background Image
go to the personal settings by right clicking your mouse and change the background. Don't forget to remove all the icons. and move the task bar to the side so they don't notice it right away.
Step 3: Get Ready to Laugh
Now all you have to do it put the computer in sleep mode and wait for someone to use the computer. They will freak out when they see the blue screen. Watch the video. Though this deos not look realistic, the sudden shock of the blue screen will freak them out before they notice the task bar.