diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index e5579e2..9fcbf53 100644
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -6661,8 +6661,7 @@
     @Override
     public void showBootMessage(final CharSequence msg, final boolean always) {
         if (Binder.getCallingUid() != Process.myUid()) {
-            // These days only the core system can call this, so apps can't get in
-            // the way of what we show about running them.
+            throw new SecurityException();
         }
         mWindowManager.showBootMessage(msg, always);
     }
diff --git a/services/java/com/android/server/SystemServer.java b/services/java/com/android/server/SystemServer.java
index 76424d8..37a9d5d 100644
--- a/services/java/com/android/server/SystemServer.java
+++ b/services/java/com/android/server/SystemServer.java
@@ -724,14 +724,6 @@
         }
         Trace.traceEnd(Trace.TRACE_TAG_SYSTEM_SERVER);
 
-        try {
-            ActivityManagerNative.getDefault().showBootMessage(
-                    context.getResources().getText(
-                            com.android.internal.R.string.android_upgrading_starting_apps),
-                    false);
-        } catch (RemoteException e) {
-        }
-
         if (mFactoryTestMode != FactoryTest.FACTORY_TEST_LOW_LEVEL) {
             if (!disableNonCoreServices) {
                 traceBeginAndSlog("StartLockSettingsService");