Windows 10: sound was not functioning in Windows, error message showing 'no output audio device is...

sound was not functioning in Windows, error message showing 'no output audio device is installed'screenshot attached. How to rectify this error? Thank you.

:)

 

No Audio Output Device is installed

Thanks to your suggestions , I have now following Device Manager (Sound ...available)







Unfortunately some drivers are not installed.
Snappy Driver showed following error , device error 28 :

Attachment 333190

Still no audio on Laptop : No Audio Output Device is installed

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Audio Output Device error message

I'm on Windows 8.1. Some drivers were updated when I logged on this evening. Now I'm getting a red cross on the sound icon bottom right of screen with the message "No Audio Output Device is installed". I need simple clear step by step instructions as to
how I fix this, please.

 

audio output device

My surface pro seven suddenly does not have sound. It says there is no audio output driver. I talked to someone at microsoft and they had me uninstall and reinstall updates. I cannot reinstall an audio driver because the device manager list of devices does
not even show sound as an option anymore. The rep I talked to finally said he had no more suggestions.

I am not sure how to fix this or why it happened.