Estou tentando iniciar meu aplicativo DirectX / SharpDX comDeviceCreationFlags.Debug mas estou recebendo o seguinte acidente na inicialização:

SharpDX.SharpDXException: HRESULT: [0x80004005], Module: [General], ApiCode: [E_FAIL/Unspecified error], Message: Unspecified error

at SharpDX.Result.CheckError()
at SharpDX.Direct3D11.Device.CreateDevice(Adapter adapter, DriverType driverType, DeviceCreationFlags flags, FeatureLevel[] featureLevels)
at SharpDX.Direct3D11.Device..ctor(Adapter adapter, DeviceCreationFlags flags, FeatureLevel[] featureLevels)
at SharpDX.Toolkit.Graphics.GraphicsDevice..ctor(GraphicsAdapter adapter, DeviceCreationFlags flags, FeatureLevel[] featureLevels)
at SharpDX.Toolkit.GamePlatform.CreateDevice(GraphicsDeviceInformation deviceInformation)
at SharpDX.Toolkit.GraphicsDeviceManager.CreateDevice(GraphicsDeviceInformation newInfo)
at SharpDX.Toolkit.GraphicsDeviceManager.ChangeOrCreateDevice(Boolean forceCreate)
at SharpDX.Toolkit.GraphicsDeviceManager.SharpDX.Toolkit.IGraphicsDeviceManager.CreateDevice()
at SharpDX.Toolkit.Game.InitializeBeforeRun()
at SharpDX.Toolkit.GameWindowDesktop.Run()
at SharpDX.Toolkit.GamePlatform.Run(GameContext gameContext)
at SharpDX.Toolkit.Game.Run(GameContext gameContext)
at wrapper.Program.Main(String[] args)

Isso é no Win7 32bit e eu tenho o SDK e o Runtime do DirextX de junho de 2010 instalados, assim como o Windows SDK para o Windows 7.

btw, esta questão originou-se desta:SharpDX falha ao renderizar vídeo h264 usando o MediaFoundation