Disable the Touchpad in your Dell Laptop
If you don’t like the touchpad in your laptop, you’ve probably bought yourself an external USB mouse. The touchpad might get into your way when you type. So, the best thing you can do is to disable it altogether or just disable it when an external mouse is attached.
How to disable the touchpad in Dell laptops?
This is the procedure you need to follow to disable the touchpad in your Dell laptop:
Go to the Control Panel. Under the ‘Hardware and Sound’ options, click ‘Mouse’

Since you have a Dell laptop, you’ll have a special tab called ‘Dell touchpad’ in the window that pops up. Click on the touchpad picture in the window.

In the new window that appears, click ‘Device Select’

Click on the ‘Disable’ radio button to disable the touchpad completely. If you want to disable the touchpad of your Dell laptop only when an external device like a mouse is attached, check the last option that says ‘Disable Touchpad/Pointing Stick when external USB mouse is present’

That’s it. You’ve disabled your laptop’s touchpad for good. If you don’t find an option to manage your touchpad in Mouse settings, you have to install Synaptics drivers from here. Similar options can be found in other laptops as well.