On computers running Windows Pro, a Group Policy rule can be used to block access to the classic Control Panel. This makes sense, for example, if you need to allow a less experienced user access to the machine and don’t want them to unwittingly stop something.
Windows Pro
How to prevent specific system components from starting?
On computers running a Pro version of Windows, administrators can use a Group Policy rule to specify system components that are not allowed to start. Such a restriction is useful, for example, when a less experienced user is assigned to the machine.