Occasionally, the computer that grants users access to a network can lose the information that is used to authenticate a ...

Occasionally, the computer that grants users access to a network can lose the information that is used to authenticate a specific user. When this happens, the only option available is to turn your computer off for thirty seconds, and then restart your computer (you must turn off the computer to clear the cached information in the network card). Restarting may reset the authentication information that is used to grant you access to the network.  If this does not work, you must contact the network administrator to have your account reset. It is also possible that the network administrator has disabled your account.