I don't see how a person making a decision is any different from a computer making a decision. Both are programmed. The person is programmed by circumstance, and the computer is programmed by a person. (Which of course means that the computer is ultimately programmed by circumstance as well.) In both cases, the source of the programming is beyond the control of the programmed entity.
Since we don't commonly claim that computers have free will, how can we claim that humans have free will?