Problem: When you click start and you see that 'Shut down' button on the Start menu is a plain text,but it only change this action to something else in a moment.This happens in windwos 7 by default.
If you try to make it a default action,it is the simple way to do:
How to Custom power switch in Windows 7
1.You should right click the start button,and select "Properties" in the menu.
2.select "Star Menu " tab in the "Taskbar and Start Menu Properties" windows.Then set the "Power button action" to 'Restart' and apply it.
3.reboot your computer.