Are you looking to disable just the smart gesture or the touchpad completely?
Fn+F9 to toggle touchpad. If that doesnt work then you may need to re install ATK
First uninstall, reboot, reinstall, reboot good to go.
ATK quits working through a lot of Win updates, especially FC.
“Two things are infinite: the universe and human stupidity, I'm not sure about the former” ~ Albert Einstein