This is suppose to be fixed in PeopleTools 8.56 base version.
Thanks Jim. I do see the rmiregistry MS-DOS window started automatically during the process scheduler domain starup. Able to find the below note from oracle document "PeopleTools 8.56: System and Server Administration" on page#73. Not sure if this is fixed on PT 8.56 base version for windows. Note: On Windows, whenever you run a script to create or configure a domain (application server or Process Scheduler), a related rmiregistry MS-DOS window is started. You do not have to kill these command windows; these windows will be minimized.