Hi,
Any UBE you run is associated with a runbatch.exe process in OS. Go to WSJ, look for your running job and write down the "Process ID".
In windows task manager, list processes of all users, add "PID" column if you don't have it, and look for runbatch.exe process where "Process ID"="PID".
You can end that OS process to terminate that batch job.
So you have to figure out how to end a windows process, not an EO one, from OS command line. You can try "taskkill"
Hope this help.