Download Realtek High Definition Audio Codecs

1.You should enable cookies in Internet Explorer in windos 7.
2.Open the Realtek Driver Download Site,check the "I accept to the above" box,and click Next" button.
3.Then you'll see drivers including High Definition Audio Codecs,AC'97 Audio Codecs,RTL8100B(L)/RTL8100C(L),etc.Download the current driver(used the ZIP download) and install it once in windows 7.
4.Set your audio settings again in the Realtek HD Audio Manager after installation is complete.
It go just fine. I have installed this driver version in Windows 7 with no problems.