You may not like it but in the past you could kill an users account by doing some simple as dropping a corrupt jpeg onto their desktop. By not allowing files on the desktop that may be their fix.
Your post about the folders that drive the menu and such systems should be usable for you to open a command line and copy the file there. I know that some users have no interest in the command line but it's the power tool of choice at our office.
At least Windows 8 makes it easy to create a Start Screen tile for a program, or for a folder. But if you have a FILE that you open often (like a Word file, a Notepad file, or a PDF) and you want a tile to open it, there's no ready-made way to create one.
But you can do it this way. Open your Start Menu folder, which is
C:\Users\(Your Username)\AppData\Roaming\Microsoft\Windows\Start Menu\Programs
(It's a hidden folder, so just paste the above path into the File Explorer address bar.)
Then open the folder containing your file. Right-click the file's icon and select "Copy." Then right-click in the Start Menu folder and select NOT "Paste," but "Paste Shortcut."
This makes the shortcut look like an "App" to Windows 8, so if you then go to the Metro Search Screen and search for "Apps" it will come up there, and you can right-click it and "Pin to Start."