Basic problem is, that the external ports are exposed through an internal hub and share USB bandwidth with many other devices like WiFi or the Webcam (HP TrueVision HD). Running isochronous multichannel audio through a hub already is critical if its the only device. Sharing the connection with other, potentially full speed or high bandwidth, devices simply kills the audio streams.
Unless one of your USB sockets is connected to a native USB controller, you are probably out of luck with that notebook.