I also think that the problem is with the touchpad. Had similar problem with another laptop and for some reason the mouse was going up when nothing was being toched. So probably your touchpad is sending movement signal to the board.
In my case, what I did was to deactivate the touchpad, so the signals coming from it are ignored, and use a normal mouse. You can deactivate it in several ways, using windows settings or frequently with a direct function in one of the function keys. This video can help:
https://www.youtube.com/watch?v=2dAJifd7B5w&t=78s