my system crashed. i dont know what happened. whenever i turn the computer one it makes clicking sounds then goes to a question mark folder/finder face folder. i tried the reinstall discs and though they would load, once it got to the part about choosing what folder to install into there wouldnt be any folders to install. it was just blank. i tried the hardware test disc and that was working until it got to checking the memory. then the screen turned glitchy with different color lines running all across in squares. i dunno whats up!! anyone know?? how do you reformat or is that even possible under the circumstances i described? THANKS.