I have two of the LG GSA-H62L in one computer.
HL-DT-DVDRAM GSA-H62L ATA Device
Niether drive is visible in Windows Explorer.
Error Code 19 shows up in my Windows Vista Device Manager.
It appears I need a driver. Not so.
The solution is at:
http://support.microsoft.com/kb/929461Upon reboot it may initially appear that the problems still exists because drivers cannot be installed. They are atually already there. Look for the drive in Explorer.
The problem is a result of removing programs and possibly programs that came with your DVD device.