Custom Logon Message When You Login To The PC

Go To Start/Run/regedit then

"HKEY_CURRENT_MACHINE" , "Software", "Microsoft", "Windows NT", "CurrentVersion" then "WinLogon".

On the right hand panel find "LegalNoticeCaption", double click on it and add the title text that you wish to use, i.e. "WARNING" or "HELLO" or what ever you want. Click on OK to confirm.

Next double click on "LegalNoticeText" and add your message, i.e. "Don't delete files from my computer" or "Welcome to my computer" or what ever you want. Click on OK to confirm.

When you reboot a message screen will appear before the login screen with your message. You can put quite allot of text in the message.