Vista - mouse pointer sticks to top left corner of screen

m using pavilion tx 1201au(home premium 32bit) with touch screen.my prob is my mouse pointer gets stick to top left cornerof screen
and sometimes middle corner and flickers and goes on clicking by itself closing all the open windows or opening
new programme depending on which shortcut it clicks. it also turns into pen pointer. no matter how much i try it goes
back to that position like a magnet. it happens even when am using mouse instead of touch pad. i unistalled and
reinstalled the driver but condition is same after a period of about 1 hr. pls help