Ctrl + C = chaos
This first prank is relatively simple. Using a program called Macro Express from Insight Software Solutions, you can reassign common key combinations to produce unexpected results. For example, you can reassign Ctrl + C from its traditional copy function to "Close Program." Such a simple change. Such an evil masterpiece!
Best of all, you can set up Macro Express so it runs in stealth mode in the background. Which means your prey will have a tricky time tracking down the source of the problem.
Of course, if you have the free time, you could reassign every key on his keyboard to open a different webpage, or worse! Then again, that might be crossing a line, earning you a lump of coal in your Christmas stocking.
Keyboard killer
Don't celebrate Christmas? Don't mind coal? All right then, let's do it! Let's cross the line and remap his keyboard. If he's using Windows XP, just follow these instructions.
1. Go into the Control Panel.
2. Open the Regional and Language Options.
3. Click the Languages tab.
4. Choose Details.
5. Add your keyboard layout of choice.
6. Remove the old U.S. layout.
Now sit back and watch the waterworks flow from his face faucet as he tries plugging in new keyboard after keyboard, convinced they're all broken in some bizarre fashion. This nasty little trick won't kick off any virus alarms since it's a built-in function of Windows, and even the IT guy probably won't catch it on the first pass, making it a truly evil bugger of a prank. Use at your own risk.