A. Logon as the Administrator (or a member of the Administrators group) and perform the following

  1. From the Start Menu, Programs, Administrative Tools and start Event Viewer
  2. From the Log menu, select Security
  3. Double click any entry for more information
  4. Close the individual event information window
  5. To clear, select Log and clear all events. It will ask if you want to save the info, click No.
  6. It will prompt again if you are sure, click Yes
  7. Close Event Viewer

In Windows 2000 start the Event Viewer MMC snap-in (Start - Programs - Administrative Tools - Event Viewer, or via Computer Manager). Right click on the Security Log and you can clear from the context menu.