Hi jurosado,
By default, Windows DVD Maker menus are displayed at a 16:9 (widescreen) aspect ratio. Therefore, some of the menu might not appear if displayed on a standard TV that has a 4:3 aspect ratio.
If you’re still facing issues playing the videos already burnt in 16:9 aspect ratio, the problem could probably be attributed to the fact that .AVI was the file format of the source file
You may have to convert the .AVI file into .WMV format and then burn the same in 16:9 aspect ratio using Windows DVD Maker.
Converting .AVI files into .WMV format and then burning the same using Windows DVD Maker has helped a lot of users in fixing the 16:9 aspect ratio issues.
WMV format is "Windows Media Video" format, and this format will work properly with DVD Maker.
To convert .AVI file into .WMV format, I’d recommend you to use Windows Live Movie Maker.
Windows Live Movie Maker is not preloaded with Windows 7. You may download and install the same from the following link:
Movie Maker – Windows Live
http://download.live.com/moviemaker
In case you need assistance to explore the features of Windows Live Movie Maker, refer the following link:
http://windowslive.com/desktop/moviemaker
Hope this helps.
Gokul - Microsoft Support
[If this post was helpful, please click the "Vote as Helpful" (green triangle) button. If it helps in resolving your issue, click "Propose As Answer" or "Mark as Answer" button. By proposing/marking a post as Answered, or Helpful you help others find the answer faster.]