Start with Run and then enter gpedit.msc, then enter to enter the Group Policy window. Enter the following path: User Configuration < Administrative Templates < System < Ctrl+Alt+Delete options. Enter the Ctrl+Alt+Delete Options folder, right-click the Delete Task Manager file, and select Edit from the opened menu. By setting this window to Disabled and pressing OK, you have disabled your Task Manager window. You can refer to Task Manager to collect more information. To access Help, open Task Manager and click on Task Manager Help Topics from the Help menu.