Go to "Volume Control > Options > Properties > Adjust volume for", and click the Recording Item first. then please select Microphone in the "Show the following Volume Controls", and press OK Button to return to Volume Control window.
Check the "select" box under Microphone and adjust the Volume to minimum.
This is because the current CPU fan rpm is lower than the "Fan Low Limit" set, therefore a warning sign will appear. This can be corrected by going into EasyTune5 then in "Settings" under "PC Health" you will see an option where you can set the Fan low limit for the CPU fan, please make sure it is set to lower rpm than the current CPU fan speed.