I have a Toshiba Laptop (model unnecessary) running windows 8.1. the issue is that i'm trying to use my headphones (no built in mic) in the audio jack (single hybrid audio and mic jack). The laptop has a built-in microphone, but it's disabled when i plug in my headphones (opposite of what i'm intending). so i want to plug my audio-only headphones into the hybrid jack, and still use my built in mic. any suggestions?