I have windows vista installed.yes i did disable the touch pad but weirdly that doesn't have any effect on the mouse pointer being dragged automatically to the corner?!!I

I really need to know this.Step by step.If anyone can please give every detail on how to do it

I need some help urgently.My mouse pointer of my hp tx2000 laptop keeps on moving to a corner and even clicks on it's own.I have tried anti-virus and anti-malware's,no use though.Tried connecting a usb mouse thinking that it might be touch pad gone wrong but that didn't work either.I have googled for any answers but in vain.Help.