I have a MacBook, 2 GHz Intel Core 2 Duo. I've had it a little over 2 years. This morning, I went to view a slide in Keynote, and my computer just restarted on it's own. Started up and worked just fine, then I shut it down, restarted... and now my HD icon is missing from my desktop. I upgraded to Leopard almost a year ago, did an archive and install about 6 months ago. Is my HD about to go? Good thing I have AppleCare....