So first of all open the Windows Moviemaker application on your PC.
After that make any movie with some effects, videos, photos, and music in it.
Now click to “file” button on menu bar and choose “Save Movie File or simply press CTRL+P” and click on it.
Now a Save Movie wizard dialogue box is open in which you can choose as preferred location for you, simply choose the location My Computer and click to next.
Now you can change your movie name in it and choose any place where you want to save this movie, like desktop, my documents, my computer drives and others and then click to next.
Now here you can change the video formats for your movie on drop down menu of the other setting and click to next.
Now you can reach to ending point and your movie is saving to your location and place. After saving the movie click to finish and check your movie file.