How to get rid of buzzing on Microphone Recording? I'm on a laptop and unplugging doesn't work?

Lenovo y500
XO Seven Headset plugged into headphone and microphone jack using a splitter.
Quality of my voice is wonderful, but the buzzing is killing me, and even with Audacity noise reduction, I can only go so far till my own voice is altered weirdly. I have messed around with the sound levels, booster levels, and enhancements (don't have noise reduction option) in the recording devices section.

You should shield your microphone wiring…
use shielded wires for microphone…
place splitter in a closed metal box… Connect a wire between box inside and jack of splitter…
How to get rid of buzzing on Microphone Recording I am on a laptop and unplugging doesnt work
How to get rid of buzzing on Microphone Recording I am on a laptop and unplugging doesnt work - 1