You may receive the following message on a Chromebook, "You are not authorized to use this device. Please contact the administrator for sign-in permission." 

• Click "Try Again" and then click "Sign in with a different account." 
• Users should just click "Sign in with a different account" when the Chromebook is turned on to avoid the error. 
• Only GUSD accounts are authorized to sign-in at the logon screen.

Chromebook Tech Support Line: (818) 478-2664