It will stop the running action, even if it is in the middle of execution when the client gathers the stop.
It will not, however, kill any spawned processes from the ‘wait’ or ‘run’ commands, so if a binary installer was “stuck”, the
__Downloads folder may be locked and prevent downloads from the next action.
You may need to send a follow-up action to ‘taskkill.exe’ or ‘/bin/kill’ any spawned processes. As long as the follow-up action does not require any downloads it should run.