Hello everyone, I'm having this weird problem with my macbook unibody (10.7.3) and I don't know what's causing it. Simply when I start it all the files are missing (my desktop is empty), the only thing I can do is open the apps that are on the dock and they work well but if I open Finder the beach ball appears and start spinning. And when I try to shut down it just freezes and I have to press the power button until the power goes off. Can anyone help me with this? Sorry if my english is difficult to understand.