Click on the Start menu.

Choose Settings.

Click on Privacy.

Choose microphone.

Toggle the on button to "Allow apps to access your microphone".

Restart your computer for changes to take effect.

Click on the Start menu.

Choose Settings.

Click on Update & Security.

Choose Windows Updates.

Select "Check for Updates".

You may need to install the update to make sure you have the latest camera and microphone drivers and software needed for your computer.

Restart your computer for changes to take effect.