I have been experiencing repeated sound problems with Windows 10. Deleting the sound card, in device manager and re-booting has proven helpful; however, having to do this repeatedly with no consistent pattern, is a royal pain. What gives?
Sometimes the sound has worked at my user profile, but not when my spouse logs in to hers. Today, the sound works with the 'TEST" at the sound control panel, but not when trying to steam from JazzRadio of YouTube.
The fact that I am not alone is not much consolation. You are capable of better than this MS.