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WU_E_WUCLTUI_UNSUPPORTED_VERSION
WU_E_WUCLTUI_UNSUPPORTED_VERSION means a caller attempted to use an unsupported version of exported Windows Update client UI functionality. This is a compatibility problem between a UI caller and the installed client components.
What to do
- Avoid relying on undocumented or version-specific UI exports in update tools.
- Use supported WUA COM interfaces for scanning, download, installation, and history queries.
- If an internal tool triggers this code after an OS upgrade, update the tool rather than replacing system UI files.
Microsoft: Windows Update Agent API
Microsoft: Using the Windows Update Agent API
Microsoft: WUA success and error codes
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