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Bootcamp 3.1 Problems and Solutions

High DPC Latency when adjust volume

I got high DPC latency when mute/unmute or adjust volume in windows7 32bit with bootcamp 3.1...
My aduio chip is CirrusLogic CS4206A AB77. (2009 mid 13" mbp)
When I watch youtube, mbp just freeze about 1 minute at the end of video.
If I disable sound device in Deveice Manager, everything works fine.
I also try connect an external USB aduio device... no freeze.

Is this a driver problem or hardware problem?
 
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