A collegue’s desktop computer has twice lost touch with its DVD drive. The drive is OK, it’s recognized by the BIOS, it even booted from a FreeBSD DVD when told to do so. Yet Windows 7 refused to display the drive. The Device Manager utility complained about a missing driver service and something about a code 39 error. A surfing expedition revealed this article which gives some pretty accurate suggestions.
The solution is to run
regedit and navigate using these directions:
Delete any values with names like one of these:
Finally reboot and hope for the best.
I suspect Nero being the culprit in this case, but I need to check with my collegue to be certain.