After downloading the latest drivers, uninstall your current driver by following these steps: To fix this problem, simply visit your laptop manufacturer’s website and download the latest drivers’ touchpad drivers for your laptop. Sometimes the option to disable the touchpad when the mouse is connected isn’t available unless you have the latest drivers. To make changes to your registry, do the following: Keep in mind that modifying your registry can lead to system instability, therefore we suggest that you create a backup of your registry in case anything goes wrong. By performing this solution you should be able to see the option to disable touchpad when you connect a mouse in your Mouse settings. This solution works with Synaptics touchpads, so if your laptop has a Synaptics touchpad, you might want to try this solution.

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