"The security log on this system is full" in Windows XP or Windows 2003

1. Click Start, point to All Programs, point to Administrative Tools, and then clickEvent Viewer.
2. Right-click Security, and then click Properties.
3. In the Log Size area of the Security Properties window, click the Overwrite events as needed option under When maximum log size is reached.
4. Click OK.
5. Close Event Viewer.