Recently my DVD drive, an LG GSA H22N, stopped functioning in Vista. Why? I'm not entirely sure. At some point between reboots the drive disappeared from Windows Explorer and started reporting a Code 39 error (i.e., a corrupt or missing driver) in the Device Manager. I tried both uninstalling/reinstalling the driver and physically disconnecting/reconnecting the device unsuccessfully.

The solution I discovered, via Google and the Comment Ça Marche forums, was a registry hack in an INF file. I have made the fix available on my site in the hopes of saving some future person the vast amounts of agony I suffered in finding a fix. To apply the fix, download the file then right-click it and select "install".