Check to make sure that your driver is installed for your laptop. here is a link to a touchpad driver.on the website you can change the operating system to which one that you need. If that doesnt work then it probably burnt out and needs to be replaced which isnt to hard or to expensive. there are several service manuals on how to take them apart on the net. hope this helps. link is below
http://gd.panam.acer.com/home/
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