Windows 10: Unable to use microphone when using Skype

I am unable to use my microphone whilst using Skype. Camera works fine but as soon as the microphone is plugged in the computer freezes and I have to turn off the power to reboot computer. We have used Skype before on the desktop soon after upgrading to Windows 10 with no problem this is the first time we have tried to use the microphone or Skype since last September. Obviously their have been 2 major updates of windows 10 that I know of. The microphone works perfectly on my Vista laptop.

Any help would be appreciated

:)

 

In windows 10 In built mic not visible as option.

My machine is Asus S400CA. When I select recording devices, I see headset microphone or desktop microphone(not in-built) or other(built into other devices). I could chat using skype ot hangout in win 8.1 before upgrading to win10. Now I am unable to do
it. How to get inbuilt mic in to use?

 

External Microphone Issue when using Skype

I purchased a eForCity® Mini 3.5mm Flexible Microphone
to use with Skype. After plugging into the microphone port, when using Skype the person on the other end cannot hear me.

I've looked at the control panel for devices and under recordings, it's reflecting "No Audio Devices are Installed". Any suggestion on what I need to do so this microphone works is greatly appreciated.