You can permanently disable the touchpad device using Mouse and pointing devices settings in Control Panel of Windows system.
Some notebooks have a special hardware button or keyboard shortcut (Fn+F9 for example) to disable the touchpad temporary. Look into your laptop user manual to get to know how to disable the touchpad on your notebook.
Typing on notebook keyboard when touchpad is enabled is quite difficult. Any touch of the sensor by a palm moves cursor to a different part of text.
Touchpad Blocker software disables the touchpad for a small period if some keyboard button has been pressed to solve this annoying problem.
You can specify the period and a keyboard shortcut to turn touchpad blocking feature on and off.
Download a disable touchpad software for Windows right now. It's absolutely free, either for personal or business purposes: