Disable adding, dragging, dropping and closing the Taskbar's toolbars
Prevents users from manipulating desktop toolbars.
If you enable this policy, users cannot add or remove toolbars from the desktop, or drag toolbars on to or off of docked toolbars.
If users have added or removed toolbars, this policy prevents them from restoring the default configuration.
To view the toolbars that can be added to the desktop, right-click a docked toolbar (such as the taskbar beside the Start button), and point to Toolbars.