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.

How to Enable Aero in Windows 7

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.

How to Enable Aero in Windows 7

Figure 5.13

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.