Windows 2008 R2 Enterprise, 64 Bit. I am trying to check the older Event Viewer logs. To my understanding, Overwrite should clear the logs but why do i get older logs for Application and System but can't get them for Secutiry. Can anyone help or redirect me to where i can read more about event viewer logs. The Properties are as follows Application logs Log size: 20.00 MB Created: 21 May 2010 Modified: 04 July 2011 Accessed: 21 May 2010 When maximum event log size is reached - it is set to Overwrite events as needed (old events first) I have logs from 05 May 2011 Security logs Log size: 20.00 MB Created: 21 May 2010 Modified: 14 July 2011 Accessed: 21 May 2010 When maximum event log size is reached - it is set to Overwrite events as needed (old events first) I have today’s logs only - 14 July 2011 System logs Log size: 20.00 MB Created: 21 May 2010 Modified: 04 July 2011 Accessed: 21 May 2010 When maximum event log size is reached - it is set to Overwrite events as needed (old events first) I have logs from 14 July 2009 to today