By accident I inserted the Installation disk for the Mac OS X software even though it is already installed into my laptop. I tried ejecting the disk but the eject button would not do anything. I also attempted to hold down the track button while restarting my computer which did eject the disk but resulted in a bunch of small symbols flashing in the middle of my screen so I inserted the disk again. I really don't want to risk losing any of my files by re-installing the Mac OS software so I don't know how to quit the installation process.