I have a problem, i have some English songs videos, But when i open it with Windows Movie Maker get this message. "can not be imported because the codec required to reading is not installed on your computer". If you have already downloaded and installed the codec, close and restart Windows Movie Maker, and then import the video. and I have no idea to solve it?: the video i am trying to play is in MP4 format. so i think its mp4 codec Problem. Is there any solution to this.