Sorry for the delay in reply. I've been offline.
Thanks for the clarification.
In this case, the problem is not software. Unfortunately, it is a hardware-related issue.
It could be a problem with the Touchpad itself or with the flat cable that connects it to the device's motherboard.
I suggest you consult a technician you trust or the manufacturer's authorized support to check your laptop's Touchpad.
If you have any questions, don't hesitate to ask. Click on the "Reply" button below my reply.