This is a very simple process and can be done using the GSpot Codec Information Tool. Just download the program and install it. Now go into your Start Menu and open the program.
- Select File | Open and select your AVI file
- Look for the FourCC code for the file’s Video Codec
- Visit the FourCC website and find out who develops that codec
- You can now go to that developers website to download your codec. You can also visit the Codec section of wmplugins.
Note: Do not download anything labeled as a “Codec Pack” or from the links at the top of the FourCC website. This will help you stay out of trouble when playing your files.