If there are more items in Start-Program menu than can be shown in a single screen, then windows has to do either scrolling or cascading effect to display rest of the items. You can tell Windows what to do by doing this:
In regedit, navigate to [HKEY_CURRENT_USER\\Software\\Microsoft\\Windows \\CurrentVersion\\Explorer\\Advanced]
and look for key "StartMenuScrollPrograms". You may not find it there if this is your first time. In this case, create a new STRING key "StartMenuScrollPrograms" and set its value to "YES" to enable scrolling or "NO" for the cascading effect.
