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Once in a while, while I am connected to my office PC, ScreenConnect will "reconnect" for some reason.  After that, the "Blank Guest Monitor" and "Block Guest Input" are both set OFF after reconnecting.  When the session has to reconnect for whatever reason -- turn it back on like it was before instead of setting it off again.  A default setting for a given workstation would help to keep it turned on for every connection.