Have a custom tower and don't know the make/model of the drive, but it was working perfectly until recently. Tower has a DVD-ROM drive and a CD+/-R/RW burner drive. Now, it is almost as though the CD drive is not there; the Drive is gone from MY Computer, and it will not even open, like the power is shut off to it. The DVD drive is usually OK, but sometimes it vanishes for awhile and then reappears; the only difference being that it will always open/close, even when the icon is missing. I tried uninstalling some burn programs, but to absolutely no avail. Ideas????