Virtual1, thanks! I have now put the keyboard viewer on the desktop to see if there are any sticky keys if the square typing returns.
P.S. Have no spare keyboard yet. My son loves his Logitech solar Bluetooth keyboard that is very accurate (model 760); it also allows toggling from computer to phone to iPad with one button. I am considering that one if I find that keyboard is bad (5 years old but no spills).
P.P.S. In the Bluetooth prefs I have just one mouse showing.
Alex
3.1 GHz 13" MacBook Pro 2015, 8 GB RAM, OS 10.11.2, Office 2011, TimeWarner Cable
2.8 GHz Xeon Mac Pro 2010, 16 GB RAM, OS 10.11.2, Office 2011, LAN
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