This policy allows you to prevent users from being able to open context menus in the Start Menu. If you enable this policy, then invocations of context menus within the Start Menu will be ignored.
Windows Settings/
Administrative Templates/
Local Computer Policy -> Computer Configuration -> Administrative Templates -> Star Menu and Taskbar
After changing group policy options, you need to update group policy. If you do not update group policy then settings will not effect. To update it just simply type below command and also sample image is shown.
gpupdate /force
In about command we used "/force" option, this will help up to update policy options forcefully.
