. . . after the Anniversary update was applied.
I had set this to "Off" quite a while ago, and that choice was left intact, but I now have no idea where to point someone who wants to change Cortana back into a "plain old Windows search," which can be easily done by turning off "Get to know me" in the Speech, Inking, & Typing pane of privacy settings [this gets rid of the Cortana assistant] and switching off "Search Online & include web results."
When I try searching for "search online" in settings it still returns Cortana & Search settings but when that settings dialog is opened the toggle switch is nowhere to be found.
Does anyone have any idea where this is now set/unset or if this is a bug?