diff --git a/Netch/Forms/GlobalBypassIPForm.cs b/Netch/Forms/GlobalBypassIPForm.cs
index 9bdc34e7..94c3bb23 100644
--- a/Netch/Forms/GlobalBypassIPForm.cs
+++ b/Netch/Forms/GlobalBypassIPForm.cs
@@ -50,13 +50,13 @@ namespace Netch.Forms
                 MessageBoxX.Show(i18N.Translate("Please select an IP"));
         }
 
-        private void ControlButton_Click(object sender, EventArgs e)
+        private async void ControlButton_Click(object sender, EventArgs e)
         {
             Global.Settings.TUNTAP.BypassIPs.Clear();
             foreach (var ip in IPListBox.Items)
                 Global.Settings.TUNTAP.BypassIPs.Add((string)ip);
 
-            Configuration.Save();
+            await Configuration.SaveAsync();
             MessageBoxX.Show(i18N.Translate("Saved"));
             Close();
         }
diff --git a/Netch/Forms/MainForm.cs b/Netch/Forms/MainForm.cs
index 8d592aee..a51884c5 100644
--- a/Netch/Forms/MainForm.cs
+++ b/Netch/Forms/MainForm.cs
@@ -71,11 +71,15 @@ namespace Netch.Forms
             // 计算 ComboBox绘制 目标宽度
             RecordSize();
 
-            LoadServers();
+            // Bind Server
+            ServerComboBox.DataSource = Global.Settings.Server;
+            SelectLastServer();
             ServerHelper.DelayTestHelper.UpdateInterval();
 
+            // Load and Bind Mode
             ModeHelper.Load();
-            LoadModes();
+            ModeComboBox.DataSource = Global.Modes;
+            SelectLastMode();
 
             // 加载翻译
             TranslateControls();
@@ -207,7 +211,7 @@ namespace Netch.Forms
 
         #region Server
 
-        private void ImportServersFromClipboardToolStripMenuItem_Click(object sender, EventArgs e)
+        private async void ImportServersFromClipboardToolStripMenuItem_Click(object sender, EventArgs e)
         {
             var texts = Clipboard.GetText();
             if (!string.IsNullOrWhiteSpace(texts))
@@ -216,12 +220,11 @@ namespace Netch.Forms
                 Global.Settings.Server.AddRange(servers);
                 NotifyTip(i18N.TranslateFormat("Import {0} server(s) form Clipboard", servers.Count));
 
-                LoadServers();
-                Configuration.Save();
+                await Configuration.SaveAsync();
             }
         }
 
-        private void AddServerToolStripMenuItem_Click([NotNull] object? sender, EventArgs? e)
+        private async void AddServerToolStripMenuItem_Click([NotNull] object? sender, EventArgs? e)
         {
             if (sender == null)
                 throw new ArgumentNullException(nameof(sender));
@@ -231,8 +234,7 @@ namespace Netch.Forms
             Hide();
             util.Create();
 
-            LoadServers();
-            Configuration.Save();
+            await Configuration.SaveAsync();
             Show();
         }
 
@@ -262,7 +264,6 @@ namespace Netch.Forms
         {
             Hide();
             new SubscribeForm().ShowDialog();
-            LoadServers();
             Show();
         }
 
@@ -291,8 +292,7 @@ namespace Netch.Forms
             {
                 await Subscription.UpdateServersAsync();
 
-                LoadServers();
-                Configuration.Save();
+                await Configuration.SaveAsync();
                 StatusText(i18N.Translate("Subscription updated"));
             }
             catch (Exception e)
@@ -433,7 +433,7 @@ namespace Netch.Forms
             {
                 if (exception is not MessageException)
                 {
-                    Log.Error(exception, "更新失败");
+                    Log.Error(exception, "更新未处理异常");
                 }
 
                 NotifyTip(exception.Message, info: false);
@@ -469,7 +469,7 @@ namespace Netch.Forms
                 return;
             }
 
-            Configuration.Save();
+            await Configuration.SaveAsync();
 
             // 服务器、模式 需选择
             if (ServerComboBox.SelectedItem is not Server server)
@@ -541,7 +541,6 @@ namespace Netch.Forms
             {
                 i18N.Load(Global.Settings.Language);
                 TranslateControls();
-                LoadModes();
                 LoadProfiles();
             }
 
@@ -558,13 +557,6 @@ namespace Netch.Forms
 
         #region Server
 
-        private void LoadServers()
-        {
-            ServerComboBox.Items.Clear();
-            ServerComboBox.Items.AddRange(Global.Settings.Server.Cast<object>().ToArray());
-            SelectLastServer();
-        }
-
         private void SelectLastServer()
         {
             // 如果值合法，选中该位置
@@ -582,7 +574,7 @@ namespace Netch.Forms
             Global.Settings.ServerComboBoxSelectedIndex = ServerComboBox.SelectedIndex;
         }
 
-        private void EditServerPictureBox_Click(object sender, EventArgs e)
+        private async void EditServerPictureBox_Click(object sender, EventArgs e)
         {
             // 当前ServerComboBox中至少有一项
             if (!(ServerComboBox.SelectedItem is Server server))
@@ -596,8 +588,7 @@ namespace Netch.Forms
 
             Hide();
             ServerHelper.GetUtilByTypeName(server.Type).Edit(server);
-            LoadServers();
-            Configuration.Save();
+            await Configuration.SaveAsync();
             Show();
         }
 
@@ -670,21 +661,12 @@ namespace Netch.Forms
             }
 
             Global.Settings.Server.Remove(server);
-            LoadServers();
         }
 
         #endregion
 
         #region Mode
 
-        public void LoadModes()
-        {
-            ModeComboBox.Items.Clear();
-            ModeComboBox.Items.AddRange(Global.Modes.Cast<object>().ToArray());
-            ModeComboBox.Tag = null;
-            SelectLastMode();
-        }
-
         private void SelectLastMode()
         {
             // 如果值合法，选中该位置
@@ -1225,7 +1207,7 @@ namespace Netch.Forms
             Hide();
 
             if (saveConfiguration)
-                Configuration.Save();
+                await Configuration.SaveAsync();
 
             foreach (var file in new[] { Constants.TempConfig, Constants.TempRouteFile })
                 if (File.Exists(file))
diff --git a/Netch/Forms/SettingForm.cs b/Netch/Forms/SettingForm.cs
index 1d65cfab..3a71aca5 100644
--- a/Netch/Forms/SettingForm.cs
+++ b/Netch/Forms/SettingForm.cs
@@ -244,7 +244,7 @@ namespace Netch.Forms
             Show();
         }
 
-        private void ControlButton_Click(object sender, EventArgs e)
+        private async void ControlButton_Click(object sender, EventArgs e)
         {
             Utils.Utils.ComponentIterator(this, component => Utils.Utils.ChangeControlForeColor(component, Color.Black));
 
@@ -268,7 +268,7 @@ namespace Netch.Forms
 
             Utils.Utils.RegisterNetchStartupItem();
 
-            Configuration.Save();
+            await Configuration.SaveAsync();
             MessageBoxX.Show(i18N.Translate("Saved"));
             Close();
         }
diff --git a/Netch/Forms/SubscribeForm.cs b/Netch/Forms/SubscribeForm.cs
index 1edbe8fb..2109dedb 100644
--- a/Netch/Forms/SubscribeForm.cs
+++ b/Netch/Forms/SubscribeForm.cs
@@ -57,9 +57,9 @@ namespace Netch.Forms
             Global.Settings.SubscribeLink[index].Enable = SubscribeLinkListView.Items[index].Checked;
         }
 
-        private void SubscribeForm_FormClosing(object sender, FormClosingEventArgs e)
+        private async void SubscribeForm_FormClosing(object sender, FormClosingEventArgs e)
         {
-            Configuration.Save();
+            await Configuration.SaveAsync();
         }
 
         #endregion
diff --git a/Netch/Netch.cs b/Netch/Netch.cs
index ec21de9b..c121bb1d 100644
--- a/Netch/Netch.cs
+++ b/Netch/Netch.cs
@@ -44,7 +44,7 @@ namespace Netch
                     Directory.CreateDirectory(item);
 
             // 加载配置
-            Configuration.Load();
+            Configuration.LoadAsync().Wait();
 
             if (!SingleInstance.IsFirstInstance)
             {
diff --git a/Netch/Services/Updater.cs b/Netch/Services/Updater.cs
index 690ff41a..224a93b3 100644
--- a/Netch/Services/Updater.cs
+++ b/Netch/Services/Updater.cs
@@ -94,8 +94,6 @@ namespace Netch.Services
 
         #region Apply Update
 
-        private static readonly ImmutableArray<string> KeepDirectories = new List<string> { "data", "mode\\Custom", "logging" }.ToImmutableArray();
-
         private async Task ApplyUpdate()
         {
             var mainForm = Global.MainForm;
@@ -105,17 +103,7 @@ namespace Netch.Services
             ModeHelper.SuspendWatcher = true;
             // Stop and Save
             await mainForm.Stop();
-            Configuration.Save();
-
-            // Backup Configuration file
-            try
-            {
-                File.Copy(Configuration.SettingFileFullName, Configuration.SettingFileFullName + ".bak", true);
-            }
-            catch (Exception)
-            {
-                // ignored
-            }
+            await Configuration.SaveAsync();
 
             #endregion
 
@@ -123,13 +111,22 @@ namespace Netch.Services
             var extractPath = Path.Combine(_tempDirectory, "extract");
             int exitCode;
             if ((exitCode = Extract(extractPath, true)) != 0)
-                throw new Exception(i18N.Translate($"7za exit with code {exitCode}"));
+                throw new MessageException(i18N.Translate($"7za unexpectedly exited. ({exitCode})"));
+
+            var updateDirectory = Path.Combine(extractPath, "Netch");
+            if (!Directory.Exists(updateDirectory))
+                throw new MessageException(i18N.Translate("Update file top-level directory not exist"));
+
+            var updateMainProgramFilePath = Path.Combine(updateDirectory, "Netch.exe");
+            if (!File.Exists(updateMainProgramFilePath))
+                throw new MessageException(i18N.Translate($"Update file main program not exist"));
+
 
             // rename install directory files with .old suffix unless in keep folders
             MarkFilesOld();
 
             // move {tempDirectory}\extract\Netch to install folder
-            MoveAllFilesOver(Path.Combine(extractPath, "Netch"), _installDirectory);
+            MoveAllFilesOver(updateDirectory, _installDirectory);
 
             // release mutex, exit
             mainForm.Invoke(new Action(Netch.SingleInstance.Dispose));
@@ -139,33 +136,30 @@ namespace Netch.Services
 
         private void MarkFilesOld()
         {
-            // extend keepDirectories relative path to absolute path
-            var extendedKeepDirectories = KeepDirectories.Select(d => Path.Combine(_installDirectory, d)).ToImmutableArray();
+            var keepDirs = new[] { "data", "mode\\Custom", "logging" };
+
+            var keepDirFullPath = keepDirs.Select(d => Path.Combine(_installDirectory, d)).ToImmutableList();
 
-            // weed out keep files
-            List<string> filesToDelete = new();
             foreach (var file in Directory.GetFiles(_installDirectory, "*", SearchOption.AllDirectories))
             {
-                if (extendedKeepDirectories.Any(p => file.StartsWith(p)))
+                // skip keep files
+                if (keepDirFullPath.Any(p => file.StartsWith(p)))
                     continue;
 
+                // skip disable state files
                 if (Path.GetFileName(file) is ModeHelper.DisableModeDirectoryFileName)
                     continue;
 
-                filesToDelete.Add(file);
-            }
-
-            // rename files
-            foreach (var file in filesToDelete)
                 try
                 {
                     File.Move(file, file + ".old");
                 }
-                catch(Exception e)
+                catch (Exception e)
                 {
-                    Log.Error(e,"failed to rename file \"{File}\"",file);
+                    Log.Error(e, "failed to rename file \"{File}\"", file);
                     throw;
                 }
+            }
         }
 
         private int Extract(string destDirName, bool overwrite)
@@ -182,12 +176,9 @@ namespace Netch.Services
             if (overwrite)
                 argument.Append(" -y");
 
-            var process = Process.Start(new ProcessStartInfo
+            var process = Process.Start(new ProcessStartInfo(temp7za, argument.ToString())
             {
-                UseShellExecute = false,
-                WindowStyle = ProcessWindowStyle.Hidden,
-                FileName = temp7za,
-                Arguments = argument.ToString()
+                UseShellExecute = false
             })!;
 
             process.WaitForExit();
diff --git a/Netch/Utils/Bandwidth.cs b/Netch/Utils/Bandwidth.cs
index 39b79a70..54e3d1e8 100644
--- a/Netch/Utils/Bandwidth.cs
+++ b/Netch/Utils/Bandwidth.cs
@@ -5,6 +5,7 @@ using Netch.Models;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
+using System.Threading;
 using System.Threading.Tasks;
 using Serilog;
 
@@ -79,7 +80,8 @@ namespace Netch.Utils
 
             var processList = instances.Select(instance => instance.Id).ToList();
 
-            Log.Information("流量统计进程: {Processes}",  $"{string.Join(",", instances.Select(instance => $"({instance.Id})" + instance.ProcessName).ToArray())}");
+            Log.Information("流量统计进程: {Processes}",
+                $"{string.Join(",", instances.Select(instance => $"({instance.Id})" + instance.ProcessName).ToArray())}");
 
             received = 0;
 
@@ -118,7 +120,7 @@ namespace Netch.Utils
 
             while (Global.MainForm.State != State.Stopped)
             {
-                Task.Delay(1000).Wait();
+                Thread.Sleep(1000);
                 lock (counterLock)
                     Global.MainForm.OnBandwidthUpdated(received);
             }
diff --git a/Netch/Utils/Configuration.cs b/Netch/Utils/Configuration.cs
index e77c78d7..e3daaef5 100644
--- a/Netch/Utils/Configuration.cs
+++ b/Netch/Utils/Configuration.cs
@@ -4,6 +4,7 @@ using System.IO;
 using System.Linq;
 using System.Text.Json;
 using System.Text.Json.Serialization;
+using System.Threading.Tasks;
 using Serilog;
 
 namespace Netch.Utils
@@ -15,7 +16,13 @@ namespace Netch.Utils
         /// </summary>
         public static string DataDirectoryFullName => Path.Combine(Global.NetchDir, "data");
 
-        public static string SettingFileFullName => $"{DataDirectoryFullName}\\settings.json";
+        public static string FileFullName => Path.Combine(DataDirectoryFullName, FileName);
+
+        private static string BackupFileFullName => Path.Combine(DataDirectoryFullName, BackupFileName);
+
+        private const string FileName = "settings.json";
+
+        private const string BackupFileName = "settings.json.bak";
 
         private static readonly JsonSerializerOptions JsonSerializerOptions = Global.NewDefaultJsonSerializerOptions;
 
@@ -25,33 +32,44 @@ namespace Netch.Utils
             JsonSerializerOptions.Converters.Add(new JsonStringEnumConverter());
         }
 
-        /// <summary>
-        ///     加载配置
-        /// </summary>
-        public static void Load()
+        public static async Task LoadAsync()
         {
-            if (File.Exists(SettingFileFullName))
+            try
             {
-                try
+                if (!File.Exists(FileFullName))
                 {
-                    using var fileStream = File.OpenRead(SettingFileFullName);
-                    var settings = JsonSerializer.DeserializeAsync<Setting>(fileStream, JsonSerializerOptions).Result!;
-
-                    CheckSetting(settings);
-
-                    Global.Settings = settings;
-                }
-                catch (Exception e)
-                {
-                    Log.Error(e,"加载配置异常");
-                    Environment.Exit(-1);
-                    Global.Settings = null!;
+                    await SaveAsync();
+                    return;
                 }
+
+                if (await LoadAsyncCore(FileFullName))
+                    return;
+
+                Log.Information("尝试加载备份配置文件 {FileName}", BackupFileFullName);
+                await LoadAsyncCore(BackupFileFullName);
             }
-            else
+            catch (Exception e)
             {
-                // 保存默认设置
-                Save();
+                Log.Error(e, "加载配置异常");
+                Environment.Exit(-1);
+            }
+        }
+
+        private static async ValueTask<bool> LoadAsyncCore(string filename)
+        {
+            try
+            {
+                await using var fs = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read, 4096, true);
+                var settings = (await JsonSerializer.DeserializeAsync<Setting>(fs, JsonSerializerOptions))!;
+
+                CheckSetting(settings);
+                Global.Settings = settings;
+                return true;
+            }
+            catch (Exception e)
+            {
+                Log.Error(e, @"从 {FileName} 加载配置异常", filename);
+                return false;
             }
         }
 
@@ -70,13 +88,26 @@ namespace Netch.Utils
         /// <summary>
         ///     保存配置
         /// </summary>
-        public static void Save()
+        public static async Task SaveAsync()
         {
-            if (!Directory.Exists(DataDirectoryFullName))
-                Directory.CreateDirectory(DataDirectoryFullName);
+            try
+            {
+                if (!Directory.Exists(DataDirectoryFullName))
+                    Directory.CreateDirectory(DataDirectoryFullName);
 
-            using var fileStream = File.Create(SettingFileFullName);
-            JsonSerializer.SerializeAsync(fileStream, Global.Settings, JsonSerializerOptions).Wait();
+                var tempFile = Path.Combine(DataDirectoryFullName, FileFullName + ".tmp");
+
+                await using (var fileStream = new FileStream(tempFile, FileMode.Create, FileAccess.Write, FileShare.None, 4096, true))
+                {
+                    await JsonSerializer.SerializeAsync(fileStream, Global.Settings, JsonSerializerOptions);
+                }
+
+                File.Replace(tempFile, FileFullName, BackupFileFullName);
+            }
+            catch (Exception e)
+            {
+                Log.Error(e, "保存配置异常");
+            }
         }
     }
 }
\ No newline at end of file
diff --git a/Netch/Utils/ModeHelper.cs b/Netch/Utils/ModeHelper.cs
index 53481898..e3a2747a 100644
--- a/Netch/Utils/ModeHelper.cs
+++ b/Netch/Utils/ModeHelper.cs
@@ -42,7 +42,6 @@ namespace Netch.Utils
                 return;
 
             Load();
-            Global.MainForm.LoadModes();
         }
 
         public static string GetRelativePath(string fullName)
diff --git a/Netch/Utils/NetworkInterfaceUtils.cs b/Netch/Utils/NetworkInterfaceUtils.cs
index b018e31e..6857b538 100644
--- a/Netch/Utils/NetworkInterfaceUtils.cs
+++ b/Netch/Utils/NetworkInterfaceUtils.cs
@@ -1,9 +1,11 @@
 using System;
+using System.Diagnostics;
 using System.Linq;
 using System.Management;
 using System.Net;
 using System.Net.NetworkInformation;
 using System.Net.Sockets;
+using System.Threading.Tasks;
 using Netch.Models;
 using Vanara.PInvoke;
 
@@ -47,7 +49,11 @@ namespace Netch.Utils
             if (metric != null)
                 arguments += $"metric={metric} ";
 
-            Utils.ProcessRunHiddenAsync("netsh", arguments).Wait();
+            Process.Start(new ProcessStartInfo("netsh.exe", arguments)
+            {
+                UseShellExecute = false,
+                Verb = "runas"
+            })!.WaitForExit();
         }
     }
 
diff --git a/Netch/Utils/Utils.cs b/Netch/Utils/Utils.cs
index f9dd0da5..2f438cc7 100644
--- a/Netch/Utils/Utils.cs
+++ b/Netch/Utils/Utils.cs
@@ -228,37 +228,6 @@ namespace Netch.Utils
             }
         }
 
-        public static async Task ProcessRunHiddenAsync(string fileName, string arguments = "", bool print = true)
-        {
-            var p = new Process
-            {
-                StartInfo = new ProcessStartInfo
-                {
-                    FileName = fileName,
-                    Arguments = arguments,
-                    WindowStyle = ProcessWindowStyle.Hidden,
-                    Verb = "runas",
-                    UseShellExecute = false,
-                    RedirectStandardOutput = true,
-                    RedirectStandardError = true,
-                    CreateNoWindow = true
-                }
-            };
-
-            Log.Debug($"{fileName} {arguments}");
-
-            p.Start();
-            var output = await p.StandardOutput.ReadToEndAsync();
-            var error = await p.StandardError.ReadToEndAsync();
-            if (print)
-            {
-                Console.Write(output);
-                Console.Write(error);
-            }
-
-            await p.WaitForExitAsync();
-        }
-
         public static int SubnetToCidr(string value)
         {
             var subnet = IPAddress.Parse(value);