Hallo everyone, i had recently bot a mac pro and tried to install the windows 7! I have install the 64 bit onit! It works fine without any sound problems that i read that usually comes but i have another problem! As i work it stop working without respont and a noice comes from the lap top as if an old musik cd stacks and does the same noice as if it was a scratching! So i turn the lap top from the button manually three times until now! i dont know if i did any mistake at the installation of the windows 7 but the leopard doesnt do this to me! Can anzone help me? Thanks!