You can set key guard to turn on automatically by doing the following from the Key Guard & Security screen:

1. In the Key Guard group box, roll the TRACKBALL down to highlight the Guard pop-up menu.
   
   
2. Press the TRACKBALL to open the pop-up menu and reveal all the choices:
   
   
   
   • Guard after 1 minute
   • Guard after 2 minutes
   • Guard after 5 minutes
   • Guard after 15 minutes
   • Guard after 30 minutes
   • Guard after 1 hour
   • Guard after 2 hours
     
     
3. Roll the TRACKBALL to highlight the option you want, then press to select it.
   
   
4. Press DONE to save your setting.
   
   

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