I own a Lenovo Idea Pad, 110-151BR. I'm wondering how to completely disable the touchpad pointer. It drives me nuts

You can disable the touchpad and use a USB mouse. Mouse Properties is what you would look for.

Device manager controls everything, get used to using it… Get familiar…

How to disable touchpad when mouse is connected using Control Panel
Open Control Panel.
Click on Hardware and Sound.
Under "Devices and Printers," click on Mouse.
On the "Device Settings" tab, clear the Disable internal pointing device when external USB pointing device is attached option.