How do I disable one key on built-in laptop keyboard except USB keyboard?

[shanraven81]

I have trouble using my laptop keyboard.. When I typed C or pressed the down arrow button, it holds automatically... [Ex. cccccccccccccccccccccccc] But it stopped holding when I pressed other keys, I tried to disable the key using KeyTweak and it worked well but the problem is I can't press C on my USB keyboard. I tried to clean with hand towel on missing key buttons that my little brother smashed it like a drunk person... I might afraid if I pulled the whole laptop keyboard because my laptop that my cousin gave me 4 years ago... so, I have no idea to fix this problem but can you guys help me?

Version : Windows 7 Ultimate 32-bit, Samsung N102SP

 

[webworkings]

You shouldn't need to disable the keyboard. Just plugging in an external USB one should turn off the attached one. It would only then turn back on when you remove the external keyboard.