I have a customer that is having a problem with her DVD drive in her Dell Studio desktop. The drivers won't install because it can't find the drive. I also tried hooking up an external USB DVD drive and it won't recognize that. I checked in Device Manager and the internal DVD drive shows an error. I uninstall it and it can never re-install correctly. I also noticed that the external USB hard drive is showing up under "DVD/CD-ROM drives" in Device Manager.