Windows 7 Start Button Changer is a free portable tool which allows you to change your Windows 7 Start orb with just one click. No need to manually do anything. Just run the app as Administrator, choose your desired start orb bitmap and you are done.
Change Windows 7 Start Orb with Windows 7 Start Button Changer | The Windows Club
Change Windows 7 Start Orb with Windows 7 Start Button Changer | The Windows Club