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As the program executable name has 'update' in its filename, gtk4-update-icon-cache.exe is considered to be an installer program on 32-bit Windows [1], which will cause the program to fail to run unless it is running with elevated privileges (i.e. UAC). Avoid this situation by embedding a manifest file into the final executable that tells Windows that this is not a program that requires elevation. Fixes issue #3632. [1]: https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-vista/cc709628(v=ws.10)?redirectedfrom=MSDN, under section "Installer Detection Technology"