In device manager your dvd/cd device may have failed.
To remove corrupt registry entries follow below:
1 – Start Regedit.
2 – Find keys: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}
3 – Delete all Upperfilters and Lowerfilters keys.
4 – Uninstall device in device manager
5 – Scan for hardware changes in device manager.