try loading the floppy disk that came with your laptop and reloading (or loading) the CD Rom drivers. If you do not have it, get the documentation, if you have it and go to the website for the manufacturer and download/install the drivers, based on the identifying info on your laptop. It should reconfigure it back to the defaults that ran the CD when you first got it. If this is an add-on or upgrade, then check the website for instructions on download the correct drivers.