An update is available for Windows 7 and for Windows Server 2008 R2 which provides new functionality and performance improvements for the graphics platform. Get the update KB2028560 here.
I tried to install it but not sure how much is improved but give it a try. I found some mentioning that it might be a requirement for IE9 (Internet Explorer 9). It will probably come via Windows Update later on if needed.
“Judging by the information shared by Microsoft, the performance and functionality boost update for Windows 7 is designed to kick up a notch key APIs (application programming interfaces) of DirectX 11.
The Redmond company mentions such APIs as Direct2D, DirectWrite, Direct3D 10.1, and DirectX Warp.” - Softipedia