This tutorial will show you how to set you speaker as the default audio.
(click the picture to enlarge)
1. First click start and select control panel.
2. Click on Hardwar and sound
4. Then select the Speakers - click on set as default - then press ok.
This tutorial created base on Compaq Presario F700 audio problems in Windows 7, and you may also apply for any model. If you have something to ask leave your comments.