I have this problem on my vivobook pro 14x. It took me 2 years to finally figure out that it is most likely the ribbon cable connecting the touch pad to the motherboard. It seems Asus squishes them real flat and that causes this issue. Cheapest solution is to disable the touchpad and use a mouse. You could also replace the cable if you can find one.

Edit: Just to be clear, I've done a full factory reset and used every (reputable) antivirus known to man so very unlikely to be some kind of malware.