This tweak (group policy setting) forces the display of the Windows 2000 style Start menu and the display of the standard desktop icons.

START > RUN > type GPEDIT.MSC > USER CONFIGURATION > ADMINISTRATIVE TEMPLATES > START MENU AND TASKBAR > find FORCE CLASSIC START MENU > check ENABLED > OK > REBOOT

If you check DISABLED only the XP style Start menu can be displayed.
If you check NOT CONFIGURED the user can change the view.