Click Ok to close Sound Control Panel. Right click on Start > Select Device Manager. Right click on Sound driver > Select Update Driver. Click Search Online Option. If no update is found > Uninstall the driver. In top menu Click Action > Select Scan for Hardware changes. Close Device Manager. Reboot and retry Sound. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.