Hp touchpas is going insane! plz help!!!

Hi, i own an hp pavilion dv7-1464nr and i've had it for about 4 months now. the laptop has a touch pad at the base of the screen that can control several functions of the computer including raising and lowering the volume. whenever you use it to adjust the volume a small black box appears on the screen showing the volume change.

Recently though this box is appearing on its own and spazzing out, going up and down very rapidly for no reason even when im not touching the touch pad. ive tried uninstalling the audio devices and updating their drivers but no luck... im thinking maybe its the touch pad alone?

if anyone can tell me what the name of this device is, whether its under the keyboard or controller section in hardware list, so i can try reinstalling the driver for it or has another solution please help!ous

 

i am running windows vista - 64bit.