I have recently installed Windows 7 (ultimate, 64 bit), on a Medion Titanium MD 8385PC desktop making it dual boot with Windows xp. Now when I log on using xp I still have sound but not when I log on using Windows 7. The onboard soundcard is a "C-Media AZA AZ 97".
Windows 7 gives me an error message that "NoAudio Output Device is installed." Whenever I try troubleshooting I first get the message that, "High Definition Audio Device has a driver problem" and then, "Not fixed".
When I ran Windows 7 upgrade adviser it specifically said, "This device is compatible with Windows 7" next to "Devices... C Media High Definition Audio Device." This was all under the heading, "Information about upgrading to 64-bit Windows 7."
Today I have installed a cheap Yamaha PCI soundcard but that didn't help either. I still only get sound when I log on using Windows xp.
I would really appreciate any help on this one as I have spent many days and lots of hours so far without success.