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