Hi there and welcome
TO disable it, click on the start button (bottom left) and then settings
In the top right type in touchpad
Then click on Turn the Touchpad on or off.
Then set it to off by clicking on the button on the blue slide bar and it will then be disabled.
If you have any problems, or would like any additional information or assistance, please do not hesitate to let me know.
Else if you can take a second to rate my service by clicking one of the stars at the top of the screen then submit, that would be greatly appreciated.