Tell him to unplug his computer from the internet, take a propane torch and put it just below the cd drive for three days. That might make him less computer illeterate.
Usually it's "unplug the blue internet cord, wait 5 seconds, then unplug the rest of your cords. Proceed to place the computer back into its original box, seal it up, and give it back to the store. Be sure to tell them that you are not mentally capable to own a computer.