Just a thought, just in case
Do you have the same options as in the images below and have you tried adjusting them ?
I had TouchPad problems when I first got my Netbook
I would be using the TouchPad then my cursor would start doing a dopey dance around the screen so I would move my hand away from the TouchPad but the dance would continue for a few more seconds. (I put this down to the high humidity
factor but I could be wrong)
For me there was a combination of being in an area with high humidity
(Touch Sensitivity) and accidental contact
(PalmCheck) which meant I had all sorts of problems with the TouchPad until I made some adjustments.
There is no one correct setting for the TouchPad, just trial and error.
Now my TouchPad works perfectly and I haven't used a mouse in over a year
All the best, woz of oz