I have the same problem in Vista X32 the DVD-Rom disappears and or will not
respond when a disc is in the drive; formatting and reinstalling the OS does
not solve the problem.

Unfortunately the fix that Rick Rogers listed DOES NOT WORK or FIX the
PROBLEM.

What I believe to be the problem is a conflict in the "storage controller
drivers"; in the device manager I have 2 listed "ITE IT8212 ATA RAID
Controller and Microsoft iSCSI Initiator".

Anyone have any ideas how to fix or disable MS initiator driver please share
your experience.

Sincerely,