You may need to reinstall audio driver (Realtek) and allow audio app (Waves) to launch in start up apps.  When you plug in the external microphone, you should see a pop up asking which device you just plug in, select microphone and you are all set.

@Chino de Oro  internal 

@Chino de Oro​ 

dell app also not working mb return since no help

@Chino de Oro​ 

did this

??????

can not use without microphone