I've had my refurb for about 3 months. When I first got it the hard drive crashed so I sent it in and waited 2 weeks for it to get fixed. Recently, it just shuts off, probably twice an hour. I wait, and reboot and then it works fine. Anybody have any suggestions? Also, I switched to a Mac in hopes that I would have less problems then with last computer but it is the opposite. Is there a way I can return my Macbook, a lemon policy or something like that?