So this answer will be complicated.
Episode 7 of mcsm has a sentient computer
The computer is evil bc it chips everything with these Redstone mind control chips and when chipped the person''s personally gets lost. They become super robotic.
But its smiling and it's face is in green Redstone lamps.(inside it they are red) (Don't ask why they are green on one side) I think that's what makes a computer appear friendly. It also CAN have a friendly voice (choices determine if that is the case)
To interact with it it couldld either make something more "useful" (Pama reference) or in normal terms efficint, it could also help me learn about a specific topic (Mc) or it being part of a game.
Hope this doesn't confuse anyone.