From a to z http://www.hackforums.net/

I'm not sure how to go about some of these but;
Possibly make a batch file that opens the browser, goes to a proxy site, then directs to a porn site.

Create a file that upon opening loops a really annoying sound, but switch the speakers with another computer.

And this one would be easy; download This, change every key on the keyboard to any other one, set it to open on start up, then watch the confusion.

Unplug the mouse.

make the background a peniz lololol