how to make a Blender file into a WMV file

Sorry for what is a very basic question, but now that I have created the file and completed the rendering, how do I save or conver the work so it is a viewable WMV file?

If you rendered it out as an AVI, then you can import it into Windows MovieMaker and then convert it to a WMV. Although, I think MovieMaker only does 30 fps, so if your animation is 23.976 fps, then it may speed up after the conversion.