I have a wired keyboard but often I get the message "Looking for a wireless keyboard". Sometimes I try to restart several times before, at last, not getting that message and then being able to log on. Apple replaced my keyboard but I still have the problem. I then (at Apple's suggested) partitioned my disk, re-installed the operating system and tried again. Still the same problem! The only Blue Tooth device shown in the Blue Tooth pane is, correctly, my wireless mouse. What to do?