I cannot for the life of me figure out how to disable the touchpad.

I travel a lot for work and use my laptop for gaming. I use a Logitech something or other mouse w/the micro usb wireless adapter that I never take out and the touchpad just kills me when trying to type emails or when using a console screen. I don't use it, can't figure out how to disable it and am getting to the point where I'm tempted to open the laptop and cut an paths to it.

I'd like to avoid that though if possible. Any way to disable this touchpad? First laptop I've ever had that I can't do it via a function key combo or through an app in the OS or via bios.

Thanks for any help.

Fn + F1?