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#11
I agree entirely with this statement.
I sometimes use my wife's Sony Vaio and couldn't figure out why the cursor kept jumping about without reason.
It turned out I was using a wireless mouse with the Sony touchpad pointing device still enabled. I do prefer a mouse to the touchpad wherever possible, so I just disable the touchpad when I'm using a mouse.
I use a Logitech wireless mouse, which cost me £10 ($15).