|Go to device manager and uninstall the dvd drive. Restart the Pc then the OS will re-install the driver. Go back to Device Manager and check to make sure the ! has gone away.|
If it is still there then the driver for it is not part of the generic drivers avaiable in the OS system and you will need to download a driver suited to that DVD drive (and OS).
You could try to look at the Properties of the dvd drive and see what the Region is set, if the region has not been set then that could cause your problem. Set it to your region (Country).