How can i fix complete aero effect in windows 7 ultimate?

First make sure you have the latest drivers for your computer's video card. Then proceed to My Computer > Properties. What you essentially need to do is refresh your Windows Experience Index score. To do this click on "Performance Information and Tools", found on the bottom of the left frame. Next, click on "Re-run the assessment", this time found on the lower right corner of the screen. If the new value for Windows Experience Index is higher than 3, the Aero effect automatically activates.