I do like the "How to get better service" section in Rod's lair. This bit is quite amusing.
Something to remember the next time you have to take a PC for repair ;)
12 Even though you're not a technical person, ask for a complete technical breakdown, preferably to molecular level, of EXACTLY what went wrong with their lousy machine, and what was done to repair it. Make the technician guarantee that the machine will never break down again. When the technician does explain the problem, interrupt frequently, emphasizing that you did nothing wrong. Make sure the technician knows he's not dealing with a dummy. You probably know more than he does.
Something to remember the next time you have to take a PC for repair ;)