Several hours ago I opened the bottom case to see if there is any dust in the fan heatsink assembly. I tried to unscrew the fans but one of the screws was stripped . I'm now very unhappy with what I did. What should I do now? I'm almost certain that I voided the warranty since the fan assembly is not user-serviceable. I'll phone up and ask tomorrow and see what they can do for me. I just hope they would repair it (for a charge) and won't void the warranty. It is like I've done the most stupid thing ever to a computer.