'Event log is full: Security' entries keep populating realtime events in the management console.
The windows event log on the agent indicated in the error message is full. The 'Event log is full: Security' is saying that the windows Security event log is full. Other errors that might be seen are 'Event log is full: Application' or 'Event log is full: System'. Clearing the appropriate windows event log will resolve this problem. Perform the following steps to clear a windows event log: