Disclaimer: I am just shooting some info and I am not sure if any of this will help you.
I thought that had something to do with having the right software- windows has had alot of updates lately:
http://www.update.microsoft.com/micr....aspx?ln=en-us
Also I viewed a few artices discussing a similar problem:
http://www.tutorials-win.com/MovieMakerXP/58947/
http://au.answers.yahoo.com/answers2...AArDOvg&show=7
http://www.askmehelpdesk.com/multime...ker-82581.html
http://www.papajohn.org/