close all windows and make a screen shot of your desktop (print screen on your keyboard). go to paint and paste the image in paint (ctrl + v) and save the image. then right click on your taskbar and go to properties and uncheck "Lock the taskbar". now drag the taskbar down so it dissapears. right click on your desktop and go to : arrange icons > show icons. now your icons have dissapeared. then right mouse click on your desktop again and go to properties and put the screen shot you made earlier as the background. now it'll all look normal but once someone tries clicking something they will eventually go nuts and call you so you can be the hero and punk them!