My Funny Picture - Dose anyone know any good computer pranks to pull on people who doesn't know much about computers?

Dose anyone know any good computer pranks to pull on people who doesn't know much about computers?

Such as taking a sreenshot of the desktop putting it as your background then hidding the icons.

Public Comments

another good one is to leave a random disk in (like old school disk) before they go to start it up. The computer will not start properly and some people have a heck of a time trying to figure out whats wrong!
Or popping the keys off the keyboard and putting them back on, in the wrong places. So E for example is now on the X key. Anybody who touch types won't be bothered by it, but anybody that watches the keyboard when they type will be exasberated. Put a bootable Linux CD (like Knoppix) in the CD drive and reboot the computer. It will be up, but it won't be Windows on the screen. Move the Start bar to another edge (like the top, or the sides). And I will thank you in advance for the service call, should they live near my office.
easiest would be to disconnect the mouse and keyboard.
yes go to this website - http://outdoormadness.co.uk/html/fun_stuff.html click on funny software the select A-Class they will be sooooooo scared! - to exit click at the top, or should I say bottom? - check it out! another brilliant one is on the same sight in the same section - it is called slight problem - basically it says your computer is about to wipe everything...
http://computerpranks.com
there is a book you can buy about that. they sold it at costco for a while idk if they still do http://keypusher.tripod.com/pranks.htm
I have seen a program that flips the screen upside down & you have to click on the program again to have it flip back to normal. Everything operates normally in the "Flipped" mode.
Try sending them some of the pop up pranks on this site: http://www.scaryforkids.com/scary-pop-ups/
This is a Great one. Make a copy of their desktop by clicking PrtSc on top of keyboard, save to picture file , open it up full screen and it looks exactly like their original desktop but doesn't work. Try it , It's excellent.