Hi,
I realize the inconvenience you are experiencing with Windows 10. I will certainly help you.
This issue might occur if there is change in sound settings.
I suggest you to refer to the steps provided in the below Microsoft Help Article and check if it helps.
Fix sound problems:
http://windows.microsoft.com/en-us/windows-10/fix-sound-problems#v1h=tab01
Please get back to us with an update on issue with Windows 10, we will be happy to help.
Thank you.