Try this (1):
Your CD drive or DVD drive is missing or is not recognized by Windows or other programs
Your CD or DVD drive can't read or write media
The CD drive or the DVD drive does not work as expected on a computer that you upgraded to Windows Vista
1) Shut down PC.
2) Physically disconnect the CD/DVD Drive.
3) Reboot to Windows with NO DVD drive.
4) Shut down PC.
5) Physically reconnect the CD/DVD Drive.
6) Reboot to Windows with DVD drive.
7) Check Device status.