My touchpad is too sensitive

My cursor is jumping all over the place when I type. E.g. when I type "abcdefgh......" it would go like "abcfgdeh......" or worse, the cursor would jump a few lines below and it would read something like
"abcd

eijkgh...". Sent the notebook to Acer and was told there is nothing wrong except that the touchpad is way too sensitive. I can disable the touchpad by pressing the F7 key together with a "Fn" key at the bottom. But this is not permanent, I have to do this every time I turn on the notebook. Pls help.