Problem solved (sort of). I discovered that my CD/RAM drive (D:/) appears in my Explorer File and BIOs ONLY when there is media present in the drive. The drive is hard wired into my computer and not via USB. I can live with that. In the past D:/ always appeared whether media was present or not. My fear was that I would not be able to boot from the drive if missing from BIOS.
Thanks for the help.