How to Hide the Logon Script Dialog Box on a Windows Client

1. At a command prompt, type "control userpasswords2" and press Enter to open the Windows 2000-style User Accounts
    application.
2. On the Users tab, clear the Users Must Enter A User Name And Password To Use This Computer check box and then
    click OK.
3. In the Automatically Log On dialog box that appears, type the user name and password for the account you want to be
    logged on each time you start your computer.