i need a premade AI ! HELP!!!!!!!

i have already used a* and looked at the robot in the tutorials online. a* crashes my game and with the tutorial on unity, the robot script the character controller is moving slower than the walk animation, causing the walk to be bugging. i just want to use unitysteer to keep an AI in a box but there are no tutorials that are videos.if you can help me with unitysteer
,or help by sending me a vidio message me and i will REALLY REALLY appriciate it. you can also suggest an easier progam, i want something really really simple, and i dont care if the ai is off the mark a little. or you can send me a folder containing a military soldier AI and scripts along with it. i would like a premade AI better because i am starting school next week thanks alot to anyone that can help! if you havent heard, there is a fps thing that is really cool by dastardly bannana! its easy too.