In this case, thanks to Windows 7 Start Button Changer, we can change the look of the Start button easily.
Yes, the name of the program says it all. The program is very simple but effective. You have two choices, change button and restore button.
Press change button and choose one of the 10 images offered by the program. Of course, you can also create your own start buttons and select them. Follow the patterns of the buttons included in the program and choose them.
Once you select it, the new button will be set as the defaut Start button. If you decide to go back to the original button, run Windows 7 Start Button Changer and press the button Restore button.