The Prevent backing up to optical media (CD/DVD) machine setting should be configured correctly. This setting lets you prevent users from selecting optical media (CD/DVD) for storing backups. If this setting is enabled, users will be blocked from selecting optical media as a backup location. If this setting is disabled or not configured, users can select optical media as a backup location. Fix: (1) GPO: Computer Configuration\Administrative Templates\Windows Components\Backup\Client\Prevent backing up to optical media (CD/DVD) (2) KEY: HKLM\Software\Policies\Microsoft\Windows\Backup\Client\DisableBackupToOptical