DISCLAIMER : Please I will advise you create a System Restore Point (https://www.youtube.com/watch?v=n-p3saVEQtY&t=7s) before carrying on with instruction in this video.
Some users have reported OS related issues and mouse not functioning after trial of the steps. Thanks

How to Disable a Laptop Built in Keyboard
Disable Laptop keyboard to use only External Keyboard
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Disable Laptop Keyboard after restart.
Turn off Laptop Keyboard

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