Laptop Volume Buttons Not Working

Hello,
I just bought an Asus N61JQ-X1 laptop and immediately proceeded to remove the bloatware using PCdecrapifier. Everything works great except for the volume function buttons on the keyboard which dont work at all (other function buttons such as brightness DO work). Also the volume buttons above the keyboard, on the Altec Lansing speakers dont work. The volume control on the windows taskbar DOES work and the speakers themselves function fine.

I'm wondering if I may have accidentally removed something thats needed for these buttons to work?

Any suggestions on how to resolve this issue?