Press the touchpad toggle key on the keyboard, often Fn + a function key with a touchpad icon
Open Settings
Go to Bluetooth & devices or Devices
Select Touchpad
Turn off the Touchpad switch
Open Control Panel
Go to Mouse or Hardware and Sound
Open the touchpad or device settings tab
Disable the touchpad
Open Device Manager
Expand Mice and other pointing devices
Right-click the touchpad device
Select Disable device
Restart the laptop if the change does not take effect
Check the laptop manufacturer’s utility app for a touchpad disable option