I have an HP Envy Sleekbook and need help.

“Typing on the keyboard frequently resulted in unwanted touchpad input, so you may want to take advantage of the “button” in the upper-left corner that disables the touchpad when you double-click it.”

http://www.pcmag.com/article2/0,2817,2407998,00.asp

Apparently there is a button on that laptop that toggles whether using the keyboard disables the trackpad.

Do you know what the button is?

My hunch is you double-tap the button labeled 1 in this image.