Most versions of HP laptops have a Disable button directly above the touchpad.
Deactivate an HP Laptops Touchpad via Double Tap Here, I will show you 3 different ways to disable the touchpad in an HP laptop. HP laptops are equipped with touchpad drivers from Synaptics which allow you to activate, disable, and customize different touchpad settings. However, Disabling the touchpad can avoid unwanted movement of the cursor while your hand is running over it. So if your work requires something with more precision and control or you are using an external mouse instead then it’s better to turn off the touchpad on your HP laptops. TouchPad How to Deactivate the Mousepad in an HP