First, what’s this All User’s Desktop and Startup Menu? They are the places where you throw things in and expect them to show up on automatically when any user signs into the same computer.
So, in short, All User’s Desktop is located at
And all user’s startup menu is located at
The trick is that both locations are hidden. In order to see them, you will need to either directly enter them in Windows Explorer’s address bar, or turn on “Show hidden files, folders, and drives” option in Folder Options.
The location of these two folders are also appeared to be the same in Windows 8. But they are just totally different from how it sets up in XP.