How to Disable a Dell Touchpad
The touchpad on Dell laptops is a user interface component that allows you to move the on-screen cursor. The touchpad responds when you move a finger across the surface. The Dell touchpad also has two buttons below it that serve as left and right click commands. You can disable the touchpad to prevent accidental cursor movement, if you prefer to use only the keyboard or if you want to connect an external mouse to the computer.
Click on "Start" followed by "Control Panel." Locate the "Hardware and Sound" icon and click on it.
Locate the "Dell Touchpad" tab on the "Hardware and Sound" window that appears. Click on the tab. If you do not see this tab, proceed to Step 3; otherwise skip to Step 4 to continue.
Download the "Dell Touchpad drivers" from the link available in the Resources section of this article. Follow the on-screen setup instructions and restart the computer if prompted. Reopen "Control Panel" and "Hardware and Sound" and click on the newly present "Dell Touchpad" tab.
Click on the "touchpad" icon to change the settings. Click on "Device Select." Under "Touchpad," click on the button next to "Disable." If you want to also turn off the two touchpad buttons under the touchpad, select "Disable" under the "Touchpad Buttons" heading. If you want the touchpad disabled only when an external USB mouse is connected, proceed to Step 5.
Leave the settings under "Touchpad" on "Enable" and instead check off the box next to "Disable Touchpad/Pointing Stick when external USB mouse is present." This will keep the touchpad and touchpad buttons enabled except when a USB mouse is connected.