i saw a film that was played on TV back in the early 2000s and was a horror sci-fi movie. and was about a made who made an AI for the military were and it failed during a test so the military scraped the project so the developer rewrites parts of it and installs it in his lake house like a butler. the ai then develops a female personality and goes insane believing that i should be the mans real wife and tries to kill the family. the only name part i can remember is that the ai called it self lucy. i wish i could remember the name but its been over 15 years since ive seen it.