When you say Elements 10, do you mean Premiere Elements 10?
What model of camcorder is your original footage coming from and what formt and resolution is it?
When you started your Premiere Elements project, which project settings did you select?
What steps did you take out output your WMV file from this project?
Welcome to the forum.
Along with Steve's questions, when you went to Share the Timeline to WMV, what setting was chosen in the Multiplexer Tab? This ARTICLE goes into more detail.