And the common reason for this issue is the Corrupted, Incompatible Audio Driver.
Every listed app has its own toggle option which you’ve got the option to enable or disable.
Enable it for Skype or other apps which have issues with accessing your microphone, You are done.
The audio troubleshooter will look for the issues and display the results once the search is completed.
Play any audio file to check for sound.
If there is a sound, your issue is resolved.
Otherwise, click Explore additional options and proceed accordingly.
That causes Rollback or Reinstall the audio driver with the latest version is a beneficial solution.
After that Restart windows and Check Audio Sound Worked.
If not make a run at reinstall the audio driver by following the steps below.
Reinstall audio driver
Visit the equipment manufacturers website download the latest available audio Driver and save it.
Nowinstall the latest audio driver, which you previously downloaded from the machine manufacturers website.
Again restart windows and check Audio sound started workings.
There isnt any solution as yet and most are fixing it by rolling back to Windows 10.