Code 19: Windows cannot start the hardware device because its configuration information (in the registry) is incomplete or damaged.
Code 32: A driver (service) for this device has been disabled. An alternate driver may be providing this functionality.
If you run Backup Exec with tape or library hardware, and you uninstall Backup Exec and don't restart Windows before you reinstall Backup Exec, then the installation of a Backup Exec filter driver may be corrupted. Backup Exec is then prevented from discovering the tape or library hardware.
A symptom of a corrupted driver installation is that a warning icon appears on the tape drives and medium changers (libraries) in the Windows Device Manager. The device status displays either the Code 19 error or the Code 32 error, as shown in image below
Run repair of Backup Exec installation following the steps below.