Vistaar,
Aaah, and my oops.
I see from my copious notes that on 9/20/15 I installed Python and
it had a dependency KB2999226 "C runtime update".
I played with Python a bit and associated several versions of Python
with extension .py
Then I tried to remove some of those associations, and that got more
and more complicated as I tried to unassociate versions.
At which point I restored to a pre Python date to remove all Python associations.
I guess the restore left KB2999226 behind.
thank