I find that, in troubleshooting most CD-ROM
problems in WIN9X, that deleting the registry keys under HKEY_LocalMachine\enum\scsi that correspond to CD drives and restarting the computer is a good first step. Just don't erase the entry for you SCSI controller or scanner or ZIP drive or tape backup if you can avoid it. https://forums.windrivers.com/images.../2000/04/1.gif
