Keyboard commands for windows

I am trying to select an option with a window with the keyboard, does anyone know how to do it?

---------- Post added at 01:05 PM ---------- Previous post was at 11:36 AM ----------

Any assistance from those who are viewing would appreciated.

---------- Post added at 04:09 PM ---------- Previous post was at 01:05 PM ----------

Somebody must know how to do this. I know it is going back to basics and my memory is'nt as good as it use to be.