XP System process uses port 1099

XP process "System" with PID "4" uses port 1099 for
listening TCP connection. I need 1099 for RMI.
I don't want to kill "System" every time.
Any clue about asking "System" not to use port 1099?
Thanks in advance.

I'm not sure but I think this happens when I terminate a JBoss server process instead of shutting it down gracefully. Which would imply that ownership of the connection is transferred to the XP "System" process when this happens (?)

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