1. Right click on audio icon at windows taskbar and choose 'playing devices' ;

2. Disable all unused audio playing devices listed: click right button on device and 'disable' option;

3. Right click on the single audio playing device that remains and click 'properties';

4. Click on tab 'Advanced', set the audio quality to 16 bits, 44100Hz (CD Quality);

5. click OK and test the game.