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ERROR_APPCONTAINER_REQUIRED
The application declaration requires an AppContainer process
ERROR_APPCONTAINER_REQUIRED means Windows is attempting to start or use an application whose declared security model requires AppContainer isolation, but the requested activation path would create another kind of process. AppContainer activation supplies the package SID, capability SIDs, restricted token, and isolation rules expected by the application.
Launch the declared application through its package activation mechanism instead of starting an executable path directly. Check the manifest entry point, trust level, and registration state. A debugger or test harness must preserve packaged activation semantics; creating the process with a normal desktop token can bypass required brokers and therefore is rejected rather than silently weakening isolation.
What to inspect
- Use package application activation rather than direct executable launch.
- Confirm registration of the intended application entry in the manifest.
- Check that debugging tools request the correct packaged activation model.
References
- Microsoft: constructing and launching AppContainer processes
- Microsoft: AppContainer security boundary
- Microsoft: how packaged desktop applications run
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