ok, try this. Turn off your computer Unplug it, and start it with no DVD drive at all. What im hopeing is it reads as nothing in it, and it saves as that, then when you install it agian, it should say install new hardware. Blazay blah. Thats what im hopeing with this also most times when you have the 40 pin (80) you have a master and a slave. One end is colored and the other two are not. Plug in the ends only there should be one short distance away from the one plugged into your dvd drive. Try that, unless it is alredy hooked up, also Post your Computer Specs, so we can search for Problems on the net. Name of computer, if built by yourself everything inside, along with the name brand of the DVD drive and part number. Thanks, that would help you out as well as us.