No sound after Windows Update

So I recently installed a Windows Update and now I have no sound. My tower is currently hooked up to my fiances "All-In-One" computer through my mini-hdmi to her regular hdmi on the back of her computer. It has been hooked up this way since September of last year with no issues. The sound problem started after the Windows Update installed.

The video card that I'm using is a GeForce GTX 550 Ti.

I've checked the Device Manager and noticed when I open the "Sound, Video, and game controllers" it lists NVIDIA High Def Audio 3 time and it has Realtek High Def Audio once.

Same thing with my processor (Intel i5) but under my display adapters it just shows with 550Ti.

Has anyone else ran into these issues? I've Googled possible fixes but nothing has worked.

 

Your default sound output may have gotten switched away from the HDMI and back to the RealTek onboard output.
You could uninstall the windows update that broke it. What one was it?