what this proplem ?? how fix it im tired

Go to the classic Windows Control Panel > Sound settings. Verify that "Speakers" is set as the default device. It can sometimes happen that the digital output of your video card gets set as default, after updating graphics driver.

If that is already set correct, then you need to re-install your sound driver.

niceeeeeeeeeeeee im just do (auto update) for sound driver and woooooooorrrrrrrrkkkkkkkkk
thank u for help i cant leave k-lite never