All of a sudden Windows 7 (64 bit) lost all DVD and CD-ROM drives. It worked fine for about a month, then I don't know what happened.
At first I thought it was a hardware problem - that my DVD-ROM had malfunctioned. But then I realized that Windows 7 no longer picked up on Demon Tools drives either. I can boot both Windows installation and Knoppix from the DVD-drive.
So it seems to be a general problem with "disc-media". When trying to reinstall the hardware DVD-ROM Windows recognizes the drive (though sometimes simply label it as "CD-ROM drive"), but then says something went wrong - with from what I understand is a default error message (39), claiming the driver has become corrupt.
I've tried every Microsoft recommended action, i.e. uninstall, reinstall, look for driver updates etc. etc., but with no luck.
Any tip most welcome!