In this article we will look at how you can easily disable Aero in Windows 7, which may help your systems performance if you are running on a underpowered machine or your graphics card can’t support it. This should only take you a few seconds to complete and is completely reversible.
Firstly, right-click on your desktop and select Personalize
You will see that by default you are using the standard Windows 7 Theme in the Aero Themes section. (top) Simply select Windows 7 Basic in the Basic & High Contrast Themes area and Windows will take care of the rest.
If you want to re-enable Aero, simply do the same but in reverse.