my dvd burner drive isn't reading disks.

When I put any disk into it, the disk spins, the orange light goes on for about a minute then it goes off but nothing happens.

And just now when I checked, the drives have changed names.

My cd and dvd drives used to be E: and F:
But now they are D: and E:

Recently when I rebooted, the pc asked me to select from an empty drop down list which drive was my dvd burner.

Any help would be gratefully appreciated.