Change or Put a New Album Cover Photo for a MP3 Song on Windows 7

1. Open Windows Media Player on your computer (It's a default program that comes with your computer).
2. Right-Click on the photo you want to assign to your mp3 song file and press Copy . (The photo must be a square size. EX: 300x300).
3. Go back to Windows Media Player , Open the song location, Right-Click on the mp3 file than click Paste Album Art .
4. Now close the program, go to your mp3 file .. The Album Cover Photo has been changed.