The sound is always "muted" when Windows 7 boots up (64-bit) MacbookPro i7

I just got my shiny new MacBook Pro 17" (i7) via Federal Express from the Apple Store, to Shanghai China, to Alaska, to Los Angeles. I loaded Windows 7 Ultimate with Bootcamp 3.1 drivers and updated Windows with "Windows Update". Every time the computer starts the sound is muted and I have to manually un-mute it. Is there a solution? Thanks.

Okay -- it took a year -- but I just fixed it. Here is what I did. I upgraded to BootCamp 3.2, but that didn't do anything to fix the issue. Then I went into the sound properties, under the section entitled play back devices, speakers, enhancements -- check the box to "disable all enhancements". This was the clue because without checking the box to disable all enhancements, the status was listed as being "disabled" and settings were unavailable to select -- the device manager showed no problems with anything, and uninstalling the sound driver and rebooting did not fix the issue.

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