I wiped it clean and re installed windows ...all the proper drivers from Dell for an Latitude C810. Nothing still no sound and no touchpad. I called Dell support and they will not help me because I have no service tag. I have no Idea why there is no service tag but there isn't. I don't know where it came from originally its ancient. But once I start something I have to finish it or it will bug me forever. And I do know it worked before the re installment of windows. Anybody have any fresh ideas???