As a last resort I ordered a new “ Quantum Stereo Headphone with Mic for PC Laptop Desktop – QHM 316” which was very cheap. But the Creative headset refused to buckle. When the other headset mic volume was too quiet, I made several configuration changes. Uninstall the audio drivers and reinstall them.Check for “loose” connections, if it’s a wired mic headphone.Use a different “brand” mic headset, if it doesn’t work in Windows 10.Try the Microsoft “default” drivers first.Select the “correct” microphone as “default” mic device.Uninstall and Reset Skype kind of IM and voice calling software.Install the latest drivers of your “branded” mic headset.The following is the check list of solutions if your Windows 10 microphone is too quiet in volume and not audible –