>My boss ask me to make a backup function for all users PC.
>
>I use Winzip to do so, with programming to divide difference backup name depend on weekday. e.g. My Documents\*.* ==> MonDoc.zip on Monday
>
>But my boss ask for ensure user Do backup before shutdown!
>So, request me to change the setting (I think is about regedit...)
>to DISable shutdown option in Start Menu!
>

You might want to look into the Microsoft Zero Administration Kit, which gives a considerable amount of control over the start menu access. Unfortunately, there are always ways to get around things in Win9x, like shutting down from Task Manager...

>Of cos, revise the setting after backup command is called!!