So it looks like your original OS was Vista for that laptop. It appears there doesn't seem to be a driver for Win -7 64bit for the touchpad.
BTW I looked up your laptop and apparently it has an ALPS touchpad. What version - this I do not know.
However i'm not sure if this will work for you, but try it out:http://windows7forums.com/windows-7-hardware/34864-alps-touch-pad-driver-windows-7-64bit.html
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