Intel ICH 5 with ALC650F not working, pls help!

When I opened some programs , it shows the following message, something about the sound card is not working correctly. I have also searched for that kind of issues on the web , and I have already adjusted the sound control, but still cannot fix the problem, please help!

"The audio playback device Intel ICH 5 with ALC650F (Intel ICH 5) does not work.
Falling back to default"

應與 ICH 5 無關... 只是 sound chipset 問題!!!

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I can hear sounds/music, but it just keeps poping up when I open some programsssssss....   :(

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