I have a customers computer (Dell p200mmx) and I can get a cdrom to work in dos but not in windows. Windows recognises the change (picks it up in device manager) but wont let the user access it. I have 'pruned' the registry, tried disabling it and using dos drivers (including leaving it enabled) as well as moving it around from primary slave to secondary master. Any ideas?? Unfortunately, a reformat is not possible right now.