At the present time of Windows boot up/start up a popup Message can be added which contains any message you want to display.
In this time too many organizations display of a message to there instructions or policies of Organization etc.
        Here I'm going to show you How to display a personal massage at startup windows  just like "Hi this My PC".
        Let's start how you can do it too......

Display a massage at startup windows

1. At first open "Registry Editor", to open Registry Editor go to RUN by pressing windows +R button and then type "regedit" with out quotation, then click yes when prop up window appear on your screen.

 

regedit

1. Now go to ==>  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System 
2. Then right click Side pane select & open LegalNoticeCaption and hit enter then set a value that you want to see in the Menu Bar.

   LegalNoticeCaption

   
   
3. Next open LegalNoticeText and write the message you want to display when next time Windows boots. 

   LegalNoticeText

4. Close all window & Restart your pc for changes to take effect.

Thank You.....