diff --git a/applets/taskmanager/package/contents/ui/ContextMenu.qml b/applets/taskmanager/package/contents/ui/ContextMenu.qml
--- a/applets/taskmanager/package/contents/ui/ContextMenu.qml
+++ b/applets/taskmanager/package/contents/ui/ContextMenu.qml
@@ -306,7 +306,7 @@
     PlasmaComponents.MenuItem {
         id: launcherToggleAction
 
-        visible: (visualParent && visualParent.m.IsLauncher !== true && visualParent.m.IsStartup !== true)
+        visible: (visualParent && visualParent.m.IsLauncher !== true && visualParent.m.IsStartup !== true) && plasmoid.immutability !== PlasmaCore.Types.SystemImmutable
 
         enabled: visualParent && visualParent.m.LauncherUrlWithoutIcon != null
 
@@ -324,7 +324,7 @@
     }
 
     PlasmaComponents.MenuItem {
-        visible: (visualParent && visualParent.m.IsLauncher === true)
+        visible: (visualParent && visualParent.m.IsLauncher === true) && plasmoid.immutability !== PlasmaCore.Types.SystemImmutable
 
         text: i18n("Remove Launcher")
 
diff --git a/applets/taskmanager/package/contents/ui/main.qml b/applets/taskmanager/package/contents/ui/main.qml
--- a/applets/taskmanager/package/contents/ui/main.qml
+++ b/applets/taskmanager/package/contents/ui/main.qml
@@ -174,7 +174,7 @@
         highlightWindows: plasmoid.configuration.highlightWindows
 
         onAddLauncher: {
-            tasksModel.requestAddLauncher(url);
+            tasks.addLauncher(url);
         }
     }
 
@@ -331,7 +331,9 @@
     }
 
     function addLauncher(url) {
-        tasksModel.requestAddLauncher(url);
+        if (plasmoid.immutability !== PlasmaCore.Types.SystemImmutable) {
+            tasksModel.requestAddLauncher(url);
+        }
     }
 
     function resetDragSource() {