We’ve seen a lot of good (and some very, very naughty) cubicle pranks in our time. But they tend to lack sophistication. There are only so many substances you can use to fill or cover a cubicle with. After you run through the ping pong balls, post-it notes and aluminum foil, you need to find something more inventive to catch your coworkers off guard. You probably know the prank that involves turning a computer screen into the “blue screen of death”. However, the folks at EQA Office Furniture have taken this one a lot further. They show you step by step how to replace the screen background with a fake screenshot. The instructions don’t stop there. You also learn how to get rid of all the real icons and hide the start menu. It’s a pretty nefarious and very funny plot. Just be sure you’re willing to take the consequences when your coworker (and a frustrated IT tech) find out what you’ve done.

You can view instructions to the prank here.