***TRY THIS*** 1) Updating the windows experience index and then restarting Aero 2) If you have a nvidia graphics card, update it, NOT over the internet!, then update it to geforce Go 7900 GS (microsoft corporation -WDDM) from the computer it self. and then refresh you rating and then restart. 3) Ok a fix has been posted on the shellrevealed forums : It seems that it is a known issue happening when you have only 512mo of RAM and will be fix in RTM. During this time here's a workaround : A. Ensure that you have the following registry value set to : HKCU\Software\Microsoft\Windows\DWM\Composition set to 1 (32-bit DWORD) HKCU\Software\Microsoft\Windows\DWM\CompositionPolicy set to 2 (32-bit DWORD) B. Restart DWM by opening a command prompt with administrative privileges : - Type 'net stop uxsms' - Then 'net start uxsms' Some Peolpe With 1 GB of ram didn't have aero either. But updating the score on Thier computer fixed it. So my guess is people with over 512 mb of ram might be able to use the score update fix. People with 512mb ram should try the fix In Step #3