diff --git a/STranslate/View/MainWindow.xaml.cs b/STranslate/View/MainWindow.xaml.cs
index a48f4ba..82b02b0 100644
--- a/STranslate/View/MainWindow.xaml.cs
+++ b/STranslate/View/MainWindow.xaml.cs
@@ -73,6 +73,7 @@ namespace STranslate.View
         /// <param name="e"></param>
         private void Window_Deactivated(object sender, EventArgs e)
         {
+            if (vm == null) return;
             if (!vm.IsTopmost)
             {
                 vm.Speech.SpeakAsyncCancelAll();
diff --git a/STranslate/ViewModel/MainVM.cs b/STranslate/ViewModel/MainVM.cs
index 4bfb3a5..35b71e5 100644
--- a/STranslate/ViewModel/MainVM.cs
+++ b/STranslate/ViewModel/MainVM.cs
@@ -22,7 +22,7 @@ namespace STranslate.ViewModel
 
             if (!ReadConfig())
             {
-                Task.Delay(3000);
+                IsVisibility = false;
                 Environment.Exit(-1);
             }