4D system workers are a newer feature that allows external processes to be called asyncronously and communicate with 4D through callbacks. When a system worker on Windows runs a process through the command linke, the process can be found in the task manager.

The process will be found as a Background Process named Windows Command Processor:


If multiple proprocesses are running the specific one can be found by check the process ID (PID) of the system worker and the list of processes in the task manager: