The keyboard on my laptop has suddenly started typing incorrect characters. For example, if I type in ipconfig it displays 5*c6nf5g so an i comes out as a 5, a p comes out as an *, etc. It happened in the middle of working on it. Up tp then it had been fine. I've turned it off and back on again, a few times, but it still has the problem. Anyone know what it might be? Thanks in advance.