Keyboard is malfunctioning on Visual Novel ?!

[F-Off]

I'm using a Toshiba laptopWindows 8, and my main keyboard is completely nonresponsive after fall damage. As a result some keys are inadvertantly pressing on their own, but I can't tell which. (Im using an external keyboard to type this).

This is problem because on some Visual Novel games like Reminiscence (tigresoft) or Ruri no Kasane (NekoNekosoft), when I boot the games up, some unknown key is mistyping and autoselecting buttons ingame without me doing anything, so I can't play properly anymore (unable to select other buttons/selection buttons are auto selected without my control).

Is there any way to check what key is doing this and disable it?

 

[Nurti]

Maybe this site can help you: https://keyboardtester.co/
It shows you which buttons have been pressed on keyboard.
And when you know which button is bad theres surely some way to deactivate a certain button on it.
I just never did it so you would have to do some research on that matter.