This article describes how to add a Warning or a Welcome message to be displayed when a user logs on to the computer.

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs.

To enable display of a warning message, make the following changes in the registry:

  1. Start Registry Editor (Regedit).
  2. Locate the HKEY_LOCAL_MACHINE subtree, and then go to the following key:
    SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
  3. Add or modify the following values: 
       Name                 Data Type   Value
   -----------------------------------------------
   LegalNoticeCaption   REG_SZ      Dialog Caption
   LegalNoticeText      REG_SZ      Dialog Message

    For example, the “LegalNoticeCaption” can be “Important Notice:” and the “LegalNoticeText” can be “No unauthorized access is allowed”.

The user sees this dialog box after the user presses CTRL+ALT+DEL and before the user sees the logon dialog box. The user can click OK in the message box and log on normally. Quit Registry Editor.

This works for
Microsoft Windows XP Home Edition  & Microsoft Windows XP Professional

For Microsoft Windows 98, Microsoft Windows ME, Microsoft Windows NT, Microsoft Windows  2000 try http://www.saxonindia.net/software/enable-windows-logon-welcome-or-warning-message-in-windows-982000/