Headset microphone not working

I have a pic that allows both a headphone and mic connection. I went through troubleshooting and everything checks fine. The computer recognizes the mic and is registering sound output, but as soon as I go to record or talk to other people, they hear nothing. It's not just the one headset either. Please help this is the most frustrating thing I've had to deal with on my otherwise solid pc

Check the RECORDING device. Stereo Mix should be set as the Default recording device. Most programs use that as the audio source.

Posting (Filling in) "My Computer Specs" really helps us to try and help you. Without it all we can do is offer general suggestions or guess.