1. Check dialer settings.
   
   
2. Is the user on a network? If not, check the network control panel and perhaps reinstall the components.
   
   
3. If the user is on a network have them contact their sysadmin and make sure that their network is configured to dial out and to check into another computer using the same computer name on the network.
   
   
4. If the user is the LAN/sysadmin then try changing the computer name.
   
   

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