Realtek Microphone Not Working. Check that the Microphone is not covered by anything. Bluetooth headset microphone not working properly.
The Realtek software automatically detects Speakers and Microphones. On Recording Devices it shows that microphone is plugged in, but it's not working. Sometimes, there is no issue at all.
Realtek HD Audio Manager Headset microphone Help.
Also, make sure you set the record settings for the mic to select it, not the play settings.
If it doesn't, please try uninstalling your drivers and then letting Windows automatically reinstall them using Nowadays, most of the new machines come pre-installed with Audio software by the manufacturer. Check the fixes here and learn how to fix your headset microphone. Let's check that your mic isn't damaged or faulty first and get that out of the way.