So, you've made it through adding clips and transitions to your movie, but you're now having trouble uploading it to the web. This is most often caused by not creating an account with Mydeo, the site that Movie Maker uses to upload movies to the Web. You can create an account by simply going to the site.
But, if you have an account and have tried logging in, you may do best by saving your movie to your computer first. To save your movie to your computer, do the following steps.
1. Go to the left-hand menu.
2. Click "Finish Movie."
3. Go to the option "Save to My Computer" and select it.
4. Name your movie.
5. Click the setting that you would like your movie saved in. (Movie Maker recommends 340Kpbs.)
6. Log into your Mydeo account.
7. Click on "Add Video."
8. Select your video from your computer.
9. Click "Upload File."
You can also upload your file to YouTube by following similar measures. YouTube, however, has some trouble with .wmv files, and Movie Maker strictly saves in this format. If you do upload your file to YouTube, it will look grainy. Plus, once you upload your movie to this site, YouTube will own the rights to your movie and can use it any way that they wish without paying your royalties. (Mydeo does not claim any rights to your videos or movies.)
For more information on Movie Maker or for additional troubleshooting help, you should go to Windows Movie Maker Frequently Asked Questions page.