I am not sure how to disable the start menu completely but usually when a
user right clicks on the start button they are able to select Open, Explore
or Find. Use this tweak to remove these options and secure your desktop.
Open your registry and find the key [HKEY_CLASSES_ROOT\Directory\shell] then
rename it from 'shell' to 'shell.old'.
Do the same with the key [HKEY_CLASSES_ROOT\Folder\shell] and rename it to
[...\shell.old].
Once complete the two original keys should now be called
[HKEY_CLASSES_ROOT\Directory\shell.old] and
[HKEY_CLASSES_ROOT\Folder\shell.old] respectively.
Now when you right click on the start button, you should no longer be given
the option to Open, Explore or Find.
: How to diasable ( Hide ) the Start Menu ?