Code 19 means there is a driver conflict such as two devices trying to use the same resources.
Try this - Control Panel - Device Manager - CD/DVD - double click the device - Driver's Tab - click
Update Drivers (this will likely do nothing) - then RIGHT CLICK the drive - UNINSTALL - REBOOT
this will refresh the default driver stack.
Normally the above will fix that issue if not work your way down through these even if you have done
Your CD drive or DVD drive is missing or is not recognized by Windows or other programs
- a Mr Fixit
The CD drive or the DVD drive does not work as expected on a computer that you upgraded to Windows Vista
When you insert a CD or a DVD, Windows Vista may not recognize the disc
Your CD or DVD drive cannot read or write media - A Mr Fixit
CD/DVD drive does not appear in Windows Vista, or you receive this error
during Windows Vista setup after booting from the DVD (AHCI)
CD-R drive or CD-RW drive is not recognized as a recordable device
Hope these help.