I have a Dell Inspiron 2-in-1 laptop with Win10 installed (with all the latest updates). Also, I have 2 headphones, both with microphones - one 3.5 jack Chinese noname one and one USB Logitech overhead one.
When I plug my jack microphone in, it isn't recognized - the sound is played through my laptop speaker. I've tried it at another PC and with my smartphone - it works well, the issue is with the laptop only.
Not Skype nor any other apps doesn't recognize the jack microphone, however USB headphone's microphone works well - it is recognized and works nicely in all the apps.