What Roger said.

While you're in the Ease of Access center, there's about a dozen other things that you might want to turn off. For example, there are certain keyboard behaviors that, when you do them, will trigger the activation of certain features for people with disabilities. Such as holding down one of the Control keys for too long, or pressing one of the Shift keys too many times. Very irritating when those things happen to you when you're in the middle of, say, a gaming session where those activities might be a normal part of the game.