laptop help

I'm hoping someone who is computer savvy can help me on this:

I do most of my writing on a laptop. It makes it easier for me because I can take the laptop to work with me to edit and take it out back and write while getting some sun. However, after typing over a million words (in books alone) the keyboard is starting to give out. I notice that the N,C, and D keys are getting quite particular and sometimes don't register at all anymore. Is there a way I can fix the keyboard on a laptop or do I need to find something new? Thanks.

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