Thanks for the reply Ken but I've tried all of these. I downloaded the Realtek drivers as part of my Windows 7 update, I also downloaded them from MSI's site, there was an option to download the SoundBlaster drivers during the Windows 7 update but the download failed... 6 times! Each time I got the same meaningless error code, "800F020B."
I've tried installing the drivers manually for both the SoundBlaster and the Realtek, I've tried to run the Realtek with the SB physically removed from the system, I've disabled the onboard sound and tried to install/run the SB, no matter what configuration I try I get the same result, as far as Windows 7 is concerned I have no audio playback device installed. Oh yes, I almost forgot, when I look in Device Manager the audio drivers are missing, yellow triangle etc.
Then as soon as I go back to my WinXP drive I have sound.
This is a frigging joke; Realtek and SoundBlaster are not exactly unknown in the industry! I'm sure they're out there, but I've never even seen a Mobo that DIDN'T have Realtek drivers for the integrated audio, and every damned person I know who's installed an aftermarket/3rd party soundcard has installed some type of SoundBlaster!
If you or anyone else has any ideas I'd love to hear them!