Her name was Tay. She was designed to be a teen AI to run a chatroom. But she picked up a big amount of controversy saying Bush Did 911, Hitler should had done more.......you get the idea. SO someone compromised her system before going live. And Microsoft had to delete her.
Source
http://www.telegraph.co.uk/technology/2016/03/24/microsofts-teen-girl-ai-turns-into-a-hitler-loving-sex-robot-wit/
