What can I do if Windows Movie Maker stops responding when I try to play a file I have imported?
In rare cases, a file with a file type that Windows Movie Maker does not support may cause Windows Movie Maker to stop responding. This may be cause by incompatible video filters. You can verify what filters are installed and force Windows Movie Maker to avoid loading specific filters by simply restarting Windows Movie Maker.
To check your video filter settings, from the Tools menu, click Options, and then click the Compatibility tab.
Note: This information provided by Microsoft.