My working program is a BIOS flash utility.

It should be shutdown normally(call ExitWindowsEx) after the program flash
the BIOS.
But, if I put a audio CD in DVD-ROM player, it sometimes will be hang up
when screen show ".... is shuting down"

If I disable DVD-ROM player in device manager, the problem wont be ocurred
again.

I am a beginner, maybe I can disable the DVD driver in my utility, but how
to do it ?

Thanks a lot if you have any idea.

--Jacob