No Audio Output Device Installed message after Upgrading to Windows 7

I have an HP m7490n Desktop computer that I recently upgraded to Windows 7 Home Premium. I have been to numerous forums and tried to uninstall & reinstall my sound drivers. So far, I cannot find anything that works and my computer has no sound.
I also receive an error message from Windows Update saying that it cannot install the optional NVidia High Definition Audio Driver. Can someone provide any additional information that would help me solve this problem? Loving Windows 7 so far, except no sound!
Thank you
Message Edited by Dexter300 on 10-26-2009 03:07 PM

Hi Dexter,
Windows 7 looks great... and about sound issues in it on your computer, follow troubleshooting steps mentioned in below link,
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01884922&cc=us&lc=en&dlc=en
Hope this information resolves sound issues
Thanks,
Vamshi

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