Headphones built in microphone doesn't work?

I use a Lenovo laptop updated to windows 10 my computers microphone is very weak so I decided to use my headphones microphone but my computer doesn't recognize it unless I insert it in microphone pludge but still I can't use it with skype or anywhere else
what should I do? ( I reinstalled my audio driver)

A microphone is not a plug and play device. You must change the default input device for sound and recording. To make it simple to underatand-you now have 2 mics and you must tell your rig which one to use. If you have a speaker icon in win10, right click it and change each setup -both recording and sound devices must be selected and saved.