1. Once you have finished Installing Windows 7 install updated video drivers for your windows 7.
2. Refresh your WEI (Windows Experience Index) Score. In order to refresh WEI right on My Computer -> Properties, A New window with System information will be displayed as shown in figure 5.12.
3. Click on Performance Information and Tools at the bottom right side of window and view your PC’s WEI Score as shown in figure 5.13. A score of 3.0 or better is required for Windows 7 to automatically enable this feature.
4. Now click Re-run the assessment
(Or you can simply Click on start->type cmd and type following command: winsat formal)
Once your Windows Experience Index is recalculated and if it’s higher then 3.0, Aero in Windows 7 will Aero Glass will automatically be enabled.
NOTE: You can change colors by right clicking on desktop-> Personalize -> Select Windows Colors.