Just another "mistake" by MS. Come on guys, this is an obvious attempt of MS to push Bing. Because this search bar is a Bing bar. IBM used to say this is not a bug, this is an undocumented feature.

KB3194798 installed just fine (but slow) 2 days ago. And is now installing again .... hurray! Might be due to installing a language pack after it installed OK the first time.