diff --git a/Flow.Launcher/App.xaml.cs b/Flow.Launcher/App.xaml.cs
index 952ca70c458..b64c24784d0 100644
--- a/Flow.Launcher/App.xaml.cs
+++ b/Flow.Launcher/App.xaml.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Diagnostics;
+using System.IO;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
@@ -21,6 +22,7 @@
 using Flow.Launcher.ViewModel;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
 using Stopwatch = Flow.Launcher.Infrastructure.Stopwatch;
 
 namespace Flow.Launcher
@@ -31,54 +33,121 @@ public partial class App : IDisposable, ISingleInstanceApp
         private const string Unique = "Flow.Launcher_Unique_Application_Mutex";
         private static bool _disposed;
         private readonly Settings _settings;
+        private readonly IHost _host;
 
         public App()
         {
             // Initialize settings
+            WriteToLogFile(1);
             var storage = new FlowLauncherJsonStorage<Settings>();
-            _settings = storage.Load();
-            _settings.SetStorage(storage);
-            _settings.WMPInstalled = WindowsMediaPlayerHelper.IsWindowsMediaPlayerInstalled();
+            WriteToLogFile(2);
+            try
+            {
+                _settings = storage.Load();
+            }
+            catch (Exception ex)
+            {
+                WriteToLogFile(ex.Message);
+            }
+            WriteToLogFile(3);
+            try
+            {
+                _settings.SetStorage(storage);
+            }
+            catch (Exception ex)
+            {
+                WriteToLogFile(ex.Message);
+            }
+            WriteToLogFile(4);
+            try
+            {
+                _settings.WMPInstalled = WindowsMediaPlayerHelper.IsWindowsMediaPlayerInstalled();
+            }
+            catch (Exception ex)
+            {
+                WriteToLogFile(ex.Message);
+            }
+            WriteToLogFile(5);
 
             // Configure the dependency injection container
-            var host = Host.CreateDefaultBuilder()
-                .UseContentRoot(AppContext.BaseDirectory)
-                .ConfigureServices(services => services
-                    .AddSingleton(_ => _settings)
-                    .AddSingleton(sp => new Updater(sp.GetRequiredService<IPublicAPI>(), Launcher.Properties.Settings.Default.GithubRepo))
-                    .AddSingleton<Portable>()
-                    .AddSingleton<SettingWindowViewModel>()
-                    .AddSingleton<IAlphabet, PinyinAlphabet>()
-                    .AddSingleton<StringMatcher>()
-                    .AddSingleton<Internationalization>()
-                    .AddSingleton<IPublicAPI, PublicAPIInstance>()
-                    .AddSingleton<MainViewModel>()
-                    .AddSingleton<Theme>()
-                ).Build();
-            Ioc.Default.ConfigureServices(host.Services);
+            try
+            {
+                WriteToLogFile($"AppContext.BaseDirectory: {AppContext.BaseDirectory}");
+                _host = Host.CreateDefaultBuilder()
+                    .UseContentRoot(AppContext.BaseDirectory)
+                    .ConfigureServices(services => services
+                        .AddSingleton(_ => _settings)
+                        .AddSingleton(sp => new Updater(sp.GetRequiredService<IPublicAPI>(), Launcher.Properties.Settings.Default.GithubRepo))
+                        .AddSingleton<Portable>()
+                        .AddSingleton<SettingWindowViewModel>()
+                        .AddSingleton<IAlphabet, PinyinAlphabet>()
+                        .AddSingleton<StringMatcher>()
+                        .AddSingleton<Internationalization>()
+                        .AddSingleton<IPublicAPI, PublicAPIInstance>()
+                        .AddSingleton<MainViewModel>()
+                        .AddSingleton<Theme>()
+                    ).Build();
+            }
+            catch (Exception ex)
+            {
+                WriteToLogFile(ex.Message);
+            }
+            WriteToLogFile(6);
+            try
+            {
+                Ioc.Default.ConfigureServices(_host.Services);
+            }
+            catch (Exception ex)
+            {
+                WriteToLogFile(ex.Message);
+            }
+            WriteToLogFile(7);
 
             // Initialize the public API and Settings first
             API = Ioc.Default.GetRequiredService<IPublicAPI>();
+            WriteToLogFile(8);
             _settings.Initialize();
+            WriteToLogFile(9);
+        }
+
+        private static void WriteToLogFile(string message)
+        {
+            // d:\LOG.TXT
+            using var sw = new StreamWriter("d:\\LOG.TXT", true);
+            sw.WriteLine($" {message} ");
+        }
+
+        private static void WriteToLogFile(int message)
+        {
+            // d:\LOG.TXT
+            using var sw = new StreamWriter("d:\\LOG.TXT", true);
+            sw.WriteLine($" {message} ");
         }
 
         [STAThread]
         public static void Main()
         {
+            WriteToLogFile("A");
             if (SingleInstance<App>.InitializeAsFirstInstance(Unique))
             {
+                WriteToLogFile("B");
                 using (var application = new App())
                 {
+                    WriteToLogFile("C");
                     application.InitializeComponent();
+                    WriteToLogFile("D");
                     application.Run();
+                    WriteToLogFile("E");
                 }
             }
         }
 
         private async void OnStartupAsync(object sender, StartupEventArgs e)
         {
+            WriteToLogFile(10);
             await Stopwatch.NormalAsync("|App.OnStartup|Startup cost", async () =>
             {
+                WriteToLogFile(11);
                 Ioc.Default.GetRequiredService<Portable>().PreStartCleanUpAfterPortabilityUpdate();
 
                 Log.Info("|App.OnStartup|Begin Flow Launcher startup ----------------------------------------------------");
diff --git a/Flow.Launcher/Flow.Launcher.csproj b/Flow.Launcher/Flow.Launcher.csproj
index 43c1dfd9007..d760787bcf2 100644
--- a/Flow.Launcher/Flow.Launcher.csproj
+++ b/Flow.Launcher/Flow.Launcher.csproj
@@ -90,8 +90,8 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="InputSimulator" Version="1.0.4" />
-    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.1" />
-    <PackageReference Include="Microsoft.Extensions.Hosting" Version="8.0.1" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="7.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="7.0.0" />
     <PackageReference Include="Microsoft.Toolkit.Uwp.Notifications" Version="7.1.3" />
     <PackageReference Include="Microsoft.Windows.CsWin32" Version="0.3.106">
       <PrivateAssets>all</PrivateAssets>