i had the same problem.
i had to install my motherboard drivers
because it was a new pc with new mobo, new cpu, new HDD new everything.
took me 5 hours to figure that out lol.
also you can try right clicking in SOUNDS> recording tab section and checkmark hidden devices.
also if you get muffled recordings, make sure you disable all enhancements.
im able to record sound through my sound card/chipset provided with my motherboard. man this is sweet
i hope i helped :x