Videomaker – Learn video production and editing, camera reviews › Forums › Technique › Editing › Windows Movie Maker – Video/Audio out of Sync › Not sure you can fix that
Not sure you can fix that with Windows Moviemaker. You will probably need a more advanced NLE and/or audio plugins.
Did you extract the audio from the video first? CODECs, frame rates, compression, etc. can be an issue when converting video and audio. Make sure the audio is using the same specs as the audio in the video file itself.