Add legal message to Windows 10 login

To start the editing process, type “regedit” into the Cortana search box on your Windows 10 desktop and click the proper search result to start the Registry Editor application. Navigate to this specific key:

\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System

You should see a screen that looks something like Figure A.

In the right-hand window, find these two listiings: legalnoticecaption and legalnoticetext

The value of legalnoticecaption acts as the heading of your message. Double-click legalnoticecaption and change its value to whatever text suits you, as shown in Figure B.

Double-click legalnoticetext and change its value to whatever text suits you, as shown in Figure C.

When your changes are complete, click File and then Exit to close the Registry Editor and save your work. The next time a user logs into your Windows 10 PC they will have to acknowledge the legal message by clicking the OK button before moving to the normal log-in screen.