After installing Windows 10, why doesn't my computer play sound through the speakers?

[Windows Central Question]

I updated my Windows 8 to Windows 10 about 2 days ago. Now my computer wont play sound through its speakers, but it will play sound through Headphones.

 

[Scienceguy Labs]

Open Control Panel.
Click on Device Manager.
Look down the list for the audio driver icon.
Click the arrow beside the audio driver icon.
Right click on the audio driver and choose update driver.
Click the option to allow Microsoft to search web for the update.

Hope that helps.