Microsoft announced that Windows 8 won’t include the well-known aero effects for windows borders and taskbar and it really is gone from Windows 8 RTM. Well, not really gone, you can say it can’t be enabled by given options but, there is a trick to bring Aero in Windows 8 RTM. This tutorial will guide you through the process of enabling Aero in Windows 8 RTM.
Just follow the instructions below and you would have the Aero back in Windows 8 RTM.
Instruction: • First of all, go to ‘Personalize’ by right clicking on the desktop or pressing the Windows button on your tablet and selecting ‘Personalize’.
• You ‘Personalization’ window would open. Here select ‘High Contrast Black’ theme under ‘High Contrast Themes’.
• You theme would change to black theme (don’t worry its temporary).
• Now, go to ‘Color’ menu from the bottom of ‘Personalization‘ window and leave it open.
• Go to desktop and open another ‘Personalize’ window.
• In the new window, select any Theme from ‘Windows Default Themes’.
• Your theme would change back to the normal one without aero.
• Now, go to the other window which we left open and press ‘Save Changes’.
• Now, you would have Aero on your windows borders and taskbar.
• That’s all!
Here is a quick video showing how to enable Aero in Windows 8 RTM
VIDEO
Note: The Aero brought back by the above trick makes the windows borders and taskbar 100% transparent e.g. you can view everything behind that but, still its Aero.
source:windows8core