Right-click in the bottom-left corner of the screen and select .
Even if drivers are active, the background service that manages sound may have crashed or failed to start. Drivers Installed But No Sound Windows 8
In the tab, right-click on an empty area and check both Show Disabled Devices and Show Disconnected Devices . Right-click in the bottom-left corner of the screen
If your speakers appear as disabled, right-click them and select . " and click Settings .
Windows might be trying to send audio to a disconnected monitor (HDMI) or a "ghost" device instead of your speakers.
Open the (point to the top-right corner), select Search , type "Sound," and click Settings .