Sounds like you need to upgrade your computer

Hi there,

    Your problem may be caused by a codec that Movie Maker does not like. This
    a very common issue.

    Your one-stop-don't-need-to-look-anywhere-else Solution is with a program
    called "Rename Codecs".

    Instead of reading miles of dross that is full of maybe's and perhaps's
    just run the program, it takes a few moments to identify all of the known
    codecs that cause this problem and gives you the opportunity of renaming
    them, or, you can now use the new Auto feature in version 1.5 and let the
    program take care of virtually everything to do with this problem

    You can then run Movie Maker and immediately determine if it actually was a
    codec issue. If it was a codec issue Movie Maker will now run properly. If
    it was not the issue, you have lost nothing more than a short amount of
    time.

    Whether or not it was a codec issue you must run the program once more and
    restore the problem codecs to their original names.

    The two procedures together can take less time than it did to read this
    message and a whole lot less than reading mountains of bumph that may or
    may not apply to you.

    The program "Rename Codecs" is free and available from my website.

    While there it would be a good idea to check out the tutorial on how to run
    the program...that will take around one minute of your time!!! Use this
    quick link to get there real fast http://tinyurl.com/3ewb9