EXPLANATION This message should occur only on a down-level computer. Any action to correct the problem should be performed ...

EXPLANATION    This message should occur only on a down-level computer. Any action to correct the problem should be performed on that computer.  The error log is full, and one or more error log entries have been lost.    ACTION    If you want to save the current error log file, copy it to another filename. Then clear the error log. You may do this remotely with Event Viewer.