A few words of thanks would be greatly appreciated.

Windows 7 - Display a welcome message at startup

Here's a small tip, to have Windows 7 display a custom message as startup (as a pop-up).This manipulation is done via the registry and you should take the necessary precautions beforehand:

Select Start > Run > then type "regedit" and press the Enter key.
Expand the following registry key: HKEY_LOCAL_MACHINE > SOFTWARE > Microsoft > Windows > CurrentVersion > Policies > System
The next step will invole the modifiaction of two keys
- LegalNoticeCaption - The title of the pop-up menu
- LegalNoticeText- the message content
These two keys are located in the right pane. Double click on them and edit the value field to your convenience.
Once done close the registry editor and restart your PC.