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MF_E_ALL_PROCESS_RESTART_REQUIRED
MF_E_ALL_PROCESS_RESTART_REQUIRED is a post-GRL-update lifecycle status. Protected-media trust data has changed, and all processes that can run protected media must stop using the old trust state.
Find every process that still holds protected-media state
- Stop all application instances that created PMP sessions, not only the window that displayed the original error.
- Account for helper, broker, service, and background processes that may host Media Foundation or protected playback.
- After the processes exit, create new Media Sessions and re-run the protected-environment checks rather than reusing old COM objects.
This code is broader than MF_E_PROCESS_RESTART_REQUIRED, which refers to the current process. The reason to restart is state invalidation after GRL reload, not a generic attempt to clear decoder caches. If the error persists after all relevant processes have genuinely exited, collect the GRL/revocation HRESULT that preceded the restart requirement and verify that system servicing completed.
Microsoft: GRL revocation and renewal · Microsoft: PMP process and Media Session lifecycle · Microsoft: revocation information
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