I recently got a new computer case and I noticed that my headset that has audio jacks the mic doesn't seem to work. The sound works fine, the mic doesn't. When I plug in a headset that plugs into a usb port it works just fine. However when I switch over to the headset that uses the audio jacks the mic doesn't work. I go into the hardware > sound settings and it says Mic is unavailable under the recording tab. Does this mean I don't have a sound card?
You will have a soundcard, but it maybe a built in one (which is fine). Sounds like you have a headset with a green jack and a pink jack, once it is plugged in you will need to configure it in windows sound options.
You may also have a control panel for your soundcard on the task bar near the windows clock.
Did you install the soundcard's own software or just left it as Windows recognized it? I have a mobo with 6 audio jacks and because they are all auto-sensing, there is no particular jack just for the mic. They can all be either inputs or outputs. Maybe they're not recognized correctly by Windows.