This is usually my troubleshooting process. This happens all the time in Windows no matter what device you're using. 1. unplug, plug back in. Often times a pop-up menu will appear when you plug it back in. If not, just test to see if sound is coming out of the head phones. 2. See if you can change audio device manually in the taskbar icons, where the volume icon is. Right click it, and click "sounds" and go to playback devices tab. 3. unplug, change audio devices, plug back in & test. 4. unplug, reboot, plug back in. 5. Update Audio drivers. 6. Uninstall and reinstall audio drivers.    
Headphone not detected when plugged in, what is your go-to fix?
Headphone not detected when plugged in, what is your go-to fix?