There
don’t seem to be drivers for windows 7 on ECS website.
Try to run
Windows update from StartMenu>All Programs
Click on Check for updates on the top left. Once the checking is finished, click on Optional updates are available. Can you see C-Media on the list? If yes, tick it and Click Ok. Once installed, restart your system. If C-Media was not on the list, then do as follows.
Download the xp drivers from
here
Once downloaded, right click on the setup.exe file and select Troubleshoot compatibility.
Then click on
Try Recommended settings. Then click on
Start the program . Follow screen instructions.
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Also
update the bios, the latest one seem to have lots of fixes. (check your existing bios version, just in case you have the latest)