How to disable hardware acceleration windows 7

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Some of the graphics rendering registry settings have different default values, depending on whether your video card uses an XPDM or WDDM driver. Because changes to the registry affect all WPF applications, your application should never alter these registry keys automatically, or during installation.

These registry settings are provided for troubleshooting, debugging, and product support purposes. When to Use Graphics Rendering Registry Settings This topic provides an overview of the WPF graphics rendering registry settings that affect WPF applications.