Block important function buttons in Task Manager with Group Policy

We can display user options when we press the "Ctrl+Alt+Del" key combination, including the task manager, lock the computer, change the Windows password, log off Windows, and shut down. These options are very important, we can block these buttons in Group Policy in order to prevent others from operating.

First expand the "User Settings → Administrative Templates → System → Ctrl + Alt + Del Options" branch, under the branch, there are "Delete Task Manager, Delete Locked Computer, Delete Change Password, Delete Logout". Strategy, double-click the item that needs to be masked, pop up a settings dialog box, and select "Enable Options" in the dialog box.