If you love playing Angry Birds on your PC or on your phone, then you will also love Angry Birds theme for Windows 7. The sound effects are cool, just like the one you hear while you play the game and the wallpapers are cool too. I like the red angry bird to sit on my desktop as it is the best wallpaper I can choose among the 6 wallpapers that comes with the theme.
You can download the Angry Birds theme from the Microsoft downloads center here