The security log on this system is full. Only administrators can log on to fix the problem.

I’ve been switching back and forth between user and admin account on a Windows XP system and then got this error.

The security log on this system is full. Only administrators can log on to fix the problem.

It wouldn’t let me log in as user, however admin could log in.

The Problem

As you can see from the error message, it says the security log is full. Which means that we need to either increase the log file size or make it to overwrite the log.

The Solution

To resolve this issue, login as admin and follow these steps.

Open Event viewer from Start->All Programs->Administrative Tools->Event Viewer.
Right-click on Security, and then click Properties.
In the Log Size area of the Security Properties window, click the Overwrite events as needed option under When maximum log size is reached.
Click OK.
Close Event Viewer.