[roger_smith]

It's not a hardware or software problem. It's the settings, thanks for the help though. I already accidentally fixed it. XD

Well it HAS to be either hardware or software, there isn't anything else really (obviously firmware, but that's another talk).

In this case if it's a setting, that's a software issue. You probably had a bug in the software that makes the Fn keys work how they do. It may have restarted or something and that's now why it works properly.