what is the size of the security logs %SystemRoot%\System32\Winevt\Logs\Security.evtx http://technet.microsoft.com/en-us/library/cc778402(WS.10).aspxThanks Uday Kiran, Senior Consultant Cyquent Technology Consultants, Dubai Please Mark as answer if it helps you

It's 20.00 MB (20,975,616 bytes)

It is a first-in, first-out system. Your security log has reached the 20MB maximum faster than the System and Application logs have. Therefore, the Security log had to start overwriting older events sooner. Make the Security log larger and you will help avoid this issue to some extent in the future. C Shane Cribbs http://www.georgiatechnologies.com

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

Thank you Shane for the clarity BaK1