I think it came out 2011 or 2012 and I thinks its about electronics coming alive and this guy built this special gun to kill them and at the end of the movie this girl gets into a submarine with military people I think.please help and much thanks

The Darkest Hour (http://en.wikipedia.org/wiki/The_Darkest_Hour_%28film%29)?

The Darkest Hour (http://en.wikipedia.org/wiki/The_Darkest_Hour_%28film%29)?

Yes it was thanks a lot

You're welcome.