The Free On-line Dictionary of Computing (30 December 2018):

user-unctuous

    (By analogy with user-friendly and
   user-obsequious) User-interfaces that attempt to soothe (or,
   some would say, stupify) users instead of cooperating with
   them.  Common "features" of user-unctuous systems include:
   icons of happy faces; mellow colors; melodic sound effects or
   even mood music; help tips appearing unbidden and at unhelpful
   moments; and a cloying tone either in system messages ("Oops!
   I couldn't seem to find my old preferences file!  I do think
   I'll have to make a new one!  Please press OK to continue!")
   or in labelling of system components (such as the main hard
   drive being labelled "Your Hard Drive" -- or, with infantile
   pronoun-reversal, "My Hard Drive").

   (1999-06-27)