DirectX 11 vs. 11.1: For Windows 7 and Windows Vista, you can continue to use the same DirectX 11.0 APIs as always even with this update installed. The only thing you have to do is to install the updated SDK Debug Layers to restore D3D11_CREATE_DEVICE_DEBUG functionality. If you want to take advantage of some of the new DirectX 11.1 APIs now available on Windows 7 as well, you need to use the Windows 8.0 SDK with VS 2010 or VS 2012 rather than continuing to use the legacy DirectX SDK. See Where is the DirectX SDK? and DirectX SDKs of a certain age for details.