diff --git a/Netch/Forms/MainForm.cs b/Netch/Forms/MainForm.cs
index 740445cd..d7ed7922 100644
--- a/Netch/Forms/MainForm.cs
+++ b/Netch/Forms/MainForm.cs
@@ -611,9 +611,7 @@ namespace Netch.Forms
             if (!IsWaiting())
             {
                 // 停止
-                State = State.Stopping;
-                await MainController.StopAsync();
-                State = State.Stopped;
+                await StopAsyncCore();
                 return;
             }
 
@@ -1155,6 +1153,27 @@ namespace Netch.Forms
             }
         }
 
+        private async Task StopAsyncCore()
+        {
+            State = State.Stopping;
+            await MainController.StopAsync();
+            State = State.Stopped;
+        }
+
+        public void Stop()
+        {
+            if (IsWaiting())
+                return;
+
+            if (InvokeRequired)
+            {
+                Invoke(new Action(Stop));
+                return;
+            }
+
+            StopAsyncCore().Wait();
+        }
+
         private bool IsWaiting()
         {
             return State == State.Waiting || State == State.Stopped;
@@ -1364,8 +1383,7 @@ namespace Netch.Forms
                 if (File.Exists(file))
                     File.Delete(file);
 
-            if (!IsWaiting())
-                await MainController.StopAsync();
+            Stop();
 
             Dispose();
             Environment.Exit(Environment.ExitCode);
@@ -1498,7 +1516,7 @@ namespace Netch.Forms
 
         public void NotifyTip(string text, int timeout = 0, bool info = true)
         {
-            // 会阻塞线程 timeout 秒
+            // 会阻塞线程 timeout 秒(?)
             NotifyIcon.ShowBalloonTip(timeout, UpdateChecker.Name, text, info ? ToolTipIcon.Info : ToolTipIcon.Error);
         }
 
diff --git a/Netch/Updater/Updater.cs b/Netch/Updater/Updater.cs
index 764abd92..04ca286d 100644
--- a/Netch/Updater/Updater.cs
+++ b/Netch/Updater/Updater.cs
@@ -6,8 +6,11 @@ using System.IO;
 using System.Linq;
 using System.Net;
 using System.Text;
+using System.Windows.Threading;
 using Netch.Controllers;
+using Netch.Forms;
 using Netch.Properties;
+using Netch.Services;
 using Netch.Utils;
 
 namespace Netch.Updater
@@ -95,10 +98,19 @@ namespace Netch.Updater
 
         private void ApplyUpdate()
         {
-            // Pre Update
+            var dispatcher = Dispatcher.CurrentDispatcher;
+            var mainForm = Global.MainForm;
+
+            #region PreUpdate
+
+            ModeHelper.SuspendWatcher = true;
+            // Stop and Save
+            mainForm.Stop();
+            Configuration.Save();
+
+            // Backup Configuration file
             try
             {
-                // Backup Configuration file
                 File.Copy(Configuration.SettingFileFullName, Configuration.SettingFileFullName + ".bak", true);
             }
             catch (Exception)
@@ -106,6 +118,8 @@ namespace Netch.Updater
                 // ignored
             }
 
+            #endregion
+
             // extract Update file to {tempDirectory}\extract
             var extractPath = Path.Combine(_tempDirectory, "extract");
             int exitCode;
@@ -118,11 +132,10 @@ namespace Netch.Updater
             // move {tempDirectory}\extract\Netch to install folder
             MoveAllFilesOver(Path.Combine(extractPath, "Netch"), _installDirectory);
 
-            // save, release mutex, then exit
-            Configuration.Save();
-            Global.MainForm.Invoke(new Action(() => { Netch.SingleInstance.Dispose(); }));
+            // release mutex, exit
+            dispatcher.Invoke(Netch.SingleInstance.Dispose);
             Process.Start(Global.NetchExecutable);
-            Global.MainForm.Exit(true, false);
+            Environment.Exit(0);
         }
 
         private void MarkFilesOld()
diff --git a/Netch/Utils/ModeHelper.cs b/Netch/Utils/ModeHelper.cs
index b710c055..11c47ff1 100644
--- a/Netch/Utils/ModeHelper.cs
+++ b/Netch/Utils/ModeHelper.cs
@@ -16,6 +16,8 @@ namespace Netch.Utils
 
         private static readonly FileSystemWatcher FileSystemWatcher;
 
+        public static bool SuspendWatcher { get; set; } = false;
+
         static ModeHelper()
         {
             FileSystemWatcher = new FileSystemWatcher(ModeDirectoryFullName)
@@ -33,6 +35,9 @@ namespace Netch.Utils
 
         private static void OnModeChanged(object sender, FileSystemEventArgs e)
         {
+            if (SuspendWatcher)
+                return;
+
             Load();
             Global.MainForm.LoadModes();
         }