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It's part of the UWP sandboxing system ("AppContainer"). UWP apps chat with the Runtime Broker for potentially insecure operations like opening the common file
by ripley12 4y ago
It's part of the UWP sandboxing system ("AppContainer"). UWP apps chat with the Runtime Broker for potentially insecure operations like opening the common file open dialog or printing.
There's a bit more info about it on page 709 of Windows Internals 7th Edition (Part 1).