No 6. Fun with MS Word’s Dictionary
What could be more fun than your friend finishing a sentence to see it all morphed into something totally incoherent and stupid? Yes, using autocorrect you can do that.
Go to Office button –> Options –> Proofing –> AutoCorrect Options
Here, change every bit you can.
No 5. High Contrast theme in a whisker
Just press Shift+Alt+PrintScreen and voila! You’ve just turned the brand new PC into some weird looking 80’s system. This trick works even when the computer is locked. This ‘feature’ is actually built into windows to enhance readability but only few are aware of it.
No 4. Busy PC
You just head to Control Panel –> Mouse –> Pointers and change the Normal pointer to the busy one. This will make it look like the PC is busy or worse has hung up. You could also change the normal mouse pointer to other odd pointers to annoy the unsuspecting user.
No 3. Fake Linux installation
Get a Linux Live CD and boot your friends PC from it, which will run Linux and at first no one can tell the difference if it’s the real deal or not. Your friend will probably bang his head on the table thinking what on earth just happened to his good old OS?