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Event ID 200: Action started (Microsoft-Windows-TaskScheduler/Operational)

What this Event ID actually records on disk, the EventData fields worth reading first, and where it sits in a DFIR triage workflow.

Channel
Microsoft-Windows-TaskScheduler/Operational
Provider
Microsoft-Windows-TaskScheduler%4Operational
Triage notes
Per-action launch. The TaskName field is your pivot back to 106 (register).

Microsoft Learn

https://learn.microsoft.com/en-us/windows/win32/taskschd/task-scheduler-start-pageOpen the official reference