In situations where you need users to read a legal notice before logging on, this tweak will create the caption for the notice.
Start] [Run] [Regedit]
Go to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Modify/Create String Value of Data type REG_SZ Named [LegalNoticeCaption]
Value Data for LegalNoticeCaption: [Type the Caption for the Dialog Box]
Modify/Create String Value of Data type REG_SZ Named [LegalNoticeText]
Value Data for LegalNoticeText: [Type the Data for the Legal Notice]
Exit Registry / Reboot