I was playing the usual MMO game (Maplestory) in a window, and I decided to extend my physical display to my TV as usual pressing Function + F6, after this my computer entered in a different state and started doing things when I pressed the keyboard such as... T = browse the taskbar, D = Minimizing or maximizing, P = change physical display,
Please is there anyone here that knows what happened there and/or also how to turn that feature off if I ever activate that mode again by mistake.
I got out of that by relogging windows.
Thanks in advance.

Tsk...dont really understand what you saying