Once the Game Bar is open check the box to Record Mic (the app may look slightly different depending on your version of Windows).
This will open the Xbox Game Bar or if this short cut does not work, use the Windows Search (Windows Key + S) and in the search bar and type “Xbox Game Bar” and Click “Xbox Game Bar”.
Also, if you have dual screens make sure your cursor is on the screen you need to record to start the next step.
This program can only screen record one application at a time, so open the application you wish to record audio, video, and/or microphone input.
And if your computer is up to date you can move on to the next step
Open Settings (Windows Key + I) > Update & Security > Windows Update > Check for Updates.
How to Screen Record Audio and Video on Windows 10 Check if your computer is on the latest version of Windows 10: