Audio Input and Output missing from Device Manager

Hello,

Help!!! Recently I just upgrade my HP Laptop Pavilion G series from Windows 7 to Windows 8.1. I encountered an issue where sound would just play from my speakers instead of my headphones when plugged in. Now I accidentally plugged in my headphones into the microphone jack and no sound would even play through my speakers. It also shows that the Audio Input and Output is missing from my Device Manager.

Here is the screenshot

http://imgur.com/BCW2tpB