Open the Aero troubleshooter
If your computer is having problems running the Aero desktop experience, which includes effects such as transparency, try using the Aero troubleshooter to fix the problem. It checks for common compatibility issues with running Aero, such as your computer's color, theme, power settings and your computer's video card.
Open the Aero troubleshooter by clicking the Start button , and then clicking Control Panel. In the search box, type Troubleshooter, click Troubleshooting, and then, under Appearance and Personalization, click Display Aero desktop effects.
If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
Article ID: MSW700048