Requires Microsoft® Windows® 98, Windows Me, Windows 2000 or Windows XP

Does not support either Windows 95 or Windows NT 4.0

Do not install the DirectX 9.0 beta on a machine that you need run the shader debugger for DirectX 8.1 code. There is a known issue in Beta 3 that prevents correct operation on DirectX 8.1 shaders. This will be fixed in the near future.

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