Keyboard must be press hard on a MacBook Pro (13-inch, Early 2011) I have a MacBook Pro (13-inch, Early 2011) running OS X El Captain and something unusual is happening to me when using my own account, keys must be pressed really hard to work, however on the other hand, when I'm using the  Guest account, everything works okay!

Do you know what can be the problem? What should I do?
Check that Slow Keys isn't enabled in System Preferences > Accessibility > Keyboard.