Audio Problem

A few days ago all of my usb audio solutions stopped working

atleast the volume control stopped working

this has never happened before and i don't know whats wrong, no matte which usb port i plug it to or how many times i restart my pc

i have re installed the drivers for my headset and disabled Razer Surround and tried soundblaster cinema but the volume control does not work, i can mute my mic but i can't mute sound or change the volume through any headset or speaker, ithas to be done manually on the windows thing, :L

any idea what is wrong?