Computer mess ups

I'm having a little problem with my computer. You know that bar or whatever that goes right under the one with the search bars? You know, the one where you can just click on a sight? that you often visit? Somehow mine includes the "letter N" and takes me to Nn on starfall. Does anyone know how that happened? Do I need to review that letter or something? I must be getting old. How do I remove it? Any suggestions?