Hi I my cd and dvd drives (2) are plugged in with up to date drivers, the have power and open close fine. When uninstalling and reboot the computer detects them as being there. The driver is updated and then the computer says the hardware is not detected. Olsone http://www.pchelpforum.com/cd-dvd-rom/54878-cd-dvd-hardware-not-detected.html had the same problem on another thread which I am convinced is the same. They resolved it by deleting incorrect upper lower filters in the registry however haven't mentioned how this was done. I have searched for an answer but couldn't find one, please help. Thank you Steve.