After you have downloaded and installed Windows Live Movie Maker in Windows 7, you can begin to make adjustments to the videos on your computer. If you have not yet installed this free program, you can follow the instructions in this article. One adjustment available to you is the ability to change the aspect ratio from 4:3 to 16:9 (widescreen). This setting is ideal for setting your video to use the maximum amount of space available on the screen on which you intend to view your video.
Step 1: Launch Windows Live Movie Maker.
Step 2: Click the “Click Here to Browse for Videos and Photos” in the center of the window.
Step 3: Click the “Project” tab at the top of the window.
Step 4: Click the “Widescreen” or “Standard” button at the top of the window to switch between the different aspect ratios. Once you are done, you can save the video by clicking the “Movie Maker” tab at the top-left corner of the window.