So, this is pretty much what is wrong: I animate using Zu3D Studio 3 software, I convert the project into a video file like I always do, but then when I put the video into a Movie Maker project, a message pops up saying that there is an error with the codec and that I have to delete all video/photo files from the project that have this problem. Now, I know for a fact that this is not the case, because I always use the same codec (Windows Media Video 9), which up until recently was fine, and when I try using other codecs with Movie Maker, the sound works, but there is no image. Has anyone faced this problem recently, and can anyone help me?