disparity between installed and the live cd

A discrepancy between the live cd and the installed version of 13.1:

Settings menu > Mouse and touchpad: In installed 13.1, there are two sections, General & Mouse. In the live cd 13.1, there are three: General, Mouse, and Touchpad. The touchpad section allows the disabling of the touchpad, something that I greatly desire, seeing that I am apparently a 'heavy thumbed' typer.

Thanks for your help ...

Jon