Hide and Seek (1984)

Canadian film adaptation of the science fiction novel 'The Adolescence of P-1' by Thomas J. Ryan about a young computer hacker who creates an artificial intelligence that takes over a power plant.

http://www.imdb.com/title/tt0256073/
http://en.wikipedia.org/wiki/The_Adolescence_of_P-1

The Adolescence of P-1 is a 1977 science fiction novel by Thomas J. Ryan, published by Macmillan Publishing, and in 1984 adapted into a Canadian-made TV film entitled Hide and Seek. It features a hacker who creates an artificial intelligence named P-1, which goes rogue and takes over computers in its desire to survive and seek out its creator. The book questions the value of human life, and what it means to be human. It is one of the first fictional depictions of the nature of a computer virus and how it can spread through a computer system, although predated by John Brunner's The Shockwave Rider.