Step 1: Load MP4 Video Files
Install and run the converter, then click "Add Video" to load MP4 video files that you want to convert from your computer or camcorder, or other devices like USB, cell phone, etc.

Step 2: Define Output Option
Press the gear icon on the right of the MP4 file to set WMV or AVI as the output format for Windows Movie Maker and click "Find Target" to choose a proper output path as the destination folder for the converted videos.

Step 3: Convert MP4 to WMV or AVI Format
Press "Start" to begin the conversion.
Step 4: Import MP4 into Windows Movie Maker
Launch Windows Movie Maker, go to "Load video", select the converted .wmv or .avi videos then click "ok" for using MP4 files in Windows Movie Maker.

It's just so easy and fast to use MP4 in Windows Movie Maker with the Video Converter Ultimate. Additionally, this software can also convert Video to FLV, extract audio from video, and so on. Now download it for free to verify it!
