I have downloaded the Flash 12 updater and tried to run the update. The updater complains that I need to close cfprefsd.
When I force quit cfprefsd though the Activity Monitor, it restarts it's self. I tried shutting down all my applications that were running, but this also caused cfprefsd to restart after force quit via Activity Monitor.
I have googled this with out many helpful results.
Software OS X 10.9.1 (13B3116)