: You can find the security update for the Windows Media Format 9.5 runtime at the Microsoft Download Center Codec Repositories : Sites like

Filename to look for: WM9Codecs.exe or wmfdist95.exe

Now run the setup.exe for AutoCAD 2009. Again, use Compatibility Mode: or Windows 7 . The installer will detect the WMF runtime and proceed past the error screen.

: AutoCAD 2009 requires DirectX 9.0c . If your installation fails, ensure you have manually installed the legacy DirectX End-User Runtimes. System Requirements Recap

: For persistent issues on 64-bit systems, community members often recommend tools like the Longbow Software converter, which automates the process of making older AutoCAD versions compatible with modern 64-bit Windows.

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