For some unknown and strange reasons my "Windows 7" installation stopped recognizing my DVD drive and "Windows Device Manager" showed an exclamation icon next to the DVD/CD-ROM drive, on further opening the device properties page the error shown is :

"Windows cannot start this hardware device because its configuration information (in the registry) is incomplete or damaged. (Code 19)"

The error signifies that an registry error has occurred with the device in question, you can find a working solution as demonstrated below.