O que exatamente é o "manipulador personalizado" do Agendador de Tarefas na guia Ações?
Estassãoastarefasdosistemaevocêpodeexecutaros
Aviso: Você provavelmente poderia fazer ajustes nas tarefas do sistema manipulando o registro ou encontrando outro [hack] contundente para fazê-lo, mas estes são > não deveria ser modificado pelos usuários, já que são tarefas do sistema , então você pode se preocupar com o Windows mudar isso.
You can't view Custom Handlers or Custom Triggers because there's nothing to view. They're compiled code, in DLL's. They implement the interfaces defined in the task scheduler API, these are found here:
Task Scheduler Interfaces (Windows)
You can see which DLL is called by viewing the Task definition. For example, Badge Update, notice the source is WinStoreUI.dll:
schtasks /query /XML /TN "\Microsoft\Windows\WS\Badge Update"
Because you don't need to edit it. This is not a user task, but a system task. You can export the task to XML, find the handler GUID, search regedit for it, etc, etc, but editing it still won't make sense.
If you want to edit, delete the task and import the modified XML. Still doesn't make sense, but perhaps it would satisfy those who insist on editing such tasks. I doubt, though