Function Keys problem

Ok so, I was playing a game today, and the F keys started acting strangely. They all started to do something different than they usually do. For example F12 brings up the dashboard, when normally it turns the volume down.

If I hold down the fn key it goes back to normal, until I take my finger off it, then it goes back to the different settings.

So I was wondering if there was a way to make the change when you press the Fn key down permanent, without strapping the button down with duct tape >_>.

 

thanks a lot. That worked.