how to give a massage before logon screen

Hey guys, here I am tailing you how to give a massage before log on screen. it is very simple just fallow these steps -

step1:open regedit by typing it in run(ctrl+r)
step2:goto the Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\currentVersion \polcies\system
step3:here in right side u can see there is option of ligalnotice .click on that and type your massages...as shown in fig.
step4: restart your computer

NOTE:there is two option of ligalnotice first one is heading and other one is massage.