|If you have ghost DVD drives in your system, this weird behavior may result.|
You have to clean your system of ghost DVD drives.
To this end, open a command prompt with admin privileges and give the following command:
Device Manager will open. Go to Appearances tab and tick Show Hidden Devices.
Now expand DVD Drives. If you see greyed drives there, remove them and restart your PC.
You can do this to other ghost devices with Code 45. Many of the USB flash disks will show up there. Do not bother to clean them. Otherwise, drivers for them will install when you reconnect them.
Hope this helps.