Windows Aero Switcher
is a free portable tool that allows you to turn Windows Aero On/Off with just one click
How to use:
Just run the tool and it will stay in the system tray. To disable aero click its icon and to enable aero click its icon again. If you want to exit the tool then right-click on its icon and select Exit
PS : Suggestions and Comments are welcome! If anyone has a better icon, please do send it to me for inclusion in the tool.