Hi Bcinbc,
Thank you for visiting the HP Support Forums and Welcome. I have read your thread on your HP Pavilion g7 Notebook and changing your sound settings. Here is a link to sound issues.
If that does not help try this fix from Microsoft
1. Right click speaker icon (right hand corner)
2. Select Playback devices
3. Right click Speakers
4. Enable it and set as Default
5. Click Apply/Ok
Hope this helps.
Thanks.