Hello,
I just tried loading a previous version of the driver and then installed the latest generic version on our site and the Aero index is improved, and there are no signs of any issues when dragging windows to one side to another.
I have attached the reports.



In this particular case I suggest you to try using the customized driver that is provided directly by your system manufacturer. As you may know the drivers on our site are generic versions, that may not be properly optimized for all hardware platforms due to the changes done by each Original Equipment Manufacturer, therefore is it always recommended to use the customized drivers provided by your motherboard or system manufacturer instead of a generic driver.