Please can someone help me. The students are rearranging the icons on the desktop of the widows 7 machines and its driving the staff wild. I used to fix this with a registry key in windows xp

[HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell \Bags\1\Desktop]

But this does not work with windows 7.

Has anyone found a way to apply autoarrange and icons to gridlines through a group policy or registry key.

Thanks for all your help.