I want to disable touchpad on Dell laptop

Hello everyone,
My laptop's touchpad works and I don't want it to, because I prefer a mouse. It's a Dell Inspiron 11 3000 series on windows 10 OS.

What I have tried that hasn't worked:

• start<settings<devices<mouse & touchpad<additional mouse options. This opens a window called Mouse Options which has 5 tabs up top, none of which involve the touchpad. The Hardware tab shows 2 devices: the mouse itself, and the USB. No touchpad there.
• windows key+x<mobility center. No touchpad to be found.
• various function keys. No options for touchpad on/off.
• device manager<mice and other pointing devices. Again, only the mouse and usb show up. It appears the touchpad is working without a driver, which is a little spooky.

Any other suggestions? I could try downloading a third party driver, but that seems like a step in the wrong direction.
Thanks

That works! Thank you so much!

Did you look in the BIOS?

On my Thinkpad T540P, it has a setting in the BIOS to turn off the touch pad.

While an old post, you can easily disable now from within Windows 10. Under "All Settings", mouse and touchpad settings, there is an option that says "Leave touchpad on when a mouse is connected".

Thanks, I'll give this a try!