The application is called Software Toolworks Encyclopedia. It can't find CD-ROM drive when it is run under Windows XP. The same problem occured when it was run under windows 98 unless the bootable diskette was used instead of HD. (The bootable diskette contained MSCDEX. Unfortunately, my diskette drive is out of order.) Thanks in advance!

  • What other things have you tried? Did you copy the whole CD onto the hard drive and run the install from there? Pretend you copied the CD into d:\cdrom Then also try (admin command prompt) subst o: d:\cdrom Then run the install from O: can see if it operates. Did you try a full CD-ROM emulator?
    – cybernard
    Dec 28, 2016 at 2:26
  • I suppose that the bootable diskette from my old Win98 computer needs its own CD-ROM drive, but I feel too powerless to try it. Excuse me, please. Feb 18, 2017 at 12:05
  • Have you thought about buying a USB floppy disk drive you can just plug in?
    – cybernard
    Feb 18, 2017 at 13:51
  • Also have you considered just buying something new as when I search for it, it is from 1992? Much has changed in the information we have recorded in the world since 1992.
    – cybernard
    Feb 18, 2017 at 13:57
  • bonanza.com/listings/…
    – cybernard
    Feb 18, 2017 at 14:16

1 Answer 1


You can use a virtual floppy disk driver (of which there are many examples here).

Please take also note that MSCDEXNT seems to be slightly older than the original DOS one (and it has been further gimped in Vista).

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