Windows fully supports using an external mouse in conjunction with the built-in touchpad, allowing both devices to be active simultaneously. This functionality can be managed in the Mouse or Touchpad settings within the Windows Settings app, where you can specify preferences for each device. For users looking to automatically disable the touchpad when an external mouse is connected, some laptops offer this feature in their touchpad settings or through a dedicated utility software provided by the manufacturer. This can be particularly useful for avoiding accidental touchpad inputs while using an external mouse.