ERwin DM: ORA-28056 error when trying to install or connect to Oracle Database 11g Enterprise Edition or Standard Edition Release 11.2.0.1.0 running on Microsoft Windows XP 32-bit.

Error Message:
ORA-28056: Writing audit records to Windows Event Log failed
ORA-01031: insufficient privileges 

Description:
I receive ORA-28056 errors several times when trying to install or connect ERwin DM to Oracle Database 11g Enterprise Edition or Standard Edition Release 11.2.0.1.0 running on Microsoft Windows XP 32-bit.

ERROR:
ORA-28056: Writing audit records to Windows Event Log failed
ORA-01031: insufficient privileges

Solution:
That error occurs because the Windows Event Viewer log is full and cannot log any further events.
The solution is to clear the event log as follows:  Control Panel | Administrative Tools | Event Viewer | Clear All Events