So heres the deal. I went to turn on my Macbook Pro (13 inch) and it gives me the white loading screen with the apple logo and the loading icon underneath. Now I have tried so many things to help, including most in this article: http://support.apple.com/kb/TS2570 So I then inserted the snow leopard disk which came with my macbook and tried to install it, when I try to install it it says that it cannot be installed on this computer. Any ideas? PS: I don't know much about technology.