Sound problem with windows 7 32bit intel MB dg31pr

Click start control panel hardware and sound manage audio devices playback you might have to set a default go for via high definition audio then right click on speaker you might have to configure them then select properties you will see tabs general level in this tab make sure your setting are loud enough also enhancements and advanced from the drop down list in the advanced tab select dvd quality or another then apply

click start control panel hardware and sound manage audio devices playback you should see your speakers right click select enable or you might have to configure them this option will be at the bottom of of the playback list also right click on the speaker select properties you should see a few tabs general levels enhancement and advanced you might find you need to select a different option possibly stereo or dvd or studio quality windows7
click start control panel sounds and audio devices you can adjust the volume there also select speaker volume you can change your settings there you can also tick in the box place icon in taskbar for any further changes to your sound setting by right clicking on the speaker icon in the taskbar(bottom of screen)
http://download.cnet.com/Realtek-AC-97-Driver-Windows-Vista-Windows-7/3000-2120_4-10962344.html
Realtek AC