"The security log on this system is full.Only administrators can log on to fix the problem".
Don't worrie, follow the below instruction:
- Log on "use an Administrator account".
- Click Start.
- In "Run" bar type "eventvwr" without quotation mark, and press Enter.
- In "Event Viewer" window, right click in Security and click Properties.
- In the "Security Properties" window, click to check the "Overwrite events as needed" option under "When maximum log size is reached".
- Click Ok, close the "Event Viewer" window.
- Log off or Restart.