Hi guys, my 1 year old macbook has just experienced a "Question mark of death". I was just playing games on Windows 8 with bootcamp, then my laptop hanged so I long pressed down the power button until it shut down. Upon restarting, I've lost both of my OS and a folder with a question mark came up instead... Has anyone experienced this before? Anyone know any solutions ? I don't have important data in there but it would be great if they could be recovered.