Try an external and disable the pad for a test.
I have a Dell Inspiron 1450 laptop, running Windows Vista.
A problem has developed mouse or touchpad, since I don't use an external mouse, has a mind of it's own. It is constantly showing the 'blue' as when one copies and pastes something and if the mouse arrow hovers over something it automatically clicks and goes there. I thought perhaps a virus but have ran Malwarebytes Anti-Malware and also SuperantiSpyware programs and still have the problem. I have AVG anti-virus and have also scanned for any virus's. I've not changed any mouse or touchpad settings so where this is coming from has been baffled. Any help would be greatly appreciated.