diff --git a/linker.libs/CommandHelper.cs b/linker.libs/CommandHelper.cs
index c82fb4f0..032774ff 100644
--- a/linker.libs/CommandHelper.cs
+++ b/linker.libs/CommandHelper.cs
@@ -1,4 +1,5 @@
-using System.Diagnostics;
+using System;
+using System.Diagnostics;
 using System.IO;
 
 namespace linker.libs
@@ -11,6 +12,7 @@ namespace linker.libs
         }
         public static string PowerShell(string arg, string[] commands, bool readResult = true)
         {
+            if (IsPowerShellInstalled() == false) return string.Empty;
             return Execute("powershell.exe", arg, commands, readResult);
         }
 
@@ -79,5 +81,24 @@ namespace linker.libs
             proc.Dispose();
             return string.Empty;
         }
+
+        public static bool IsPowerShellInstalled()
+        {
+            string[] powerShellPaths = {
+                Environment.ExpandEnvironmentVariables(@"%SystemRoot%\System32\WindowsPowerShell\v1.0\powershell.exe"),
+                Environment.ExpandEnvironmentVariables(@"%SystemRoot%\SysWOW64\WindowsPowerShell\v1.0\powershell.exe")
+             };
+
+            foreach (string path in powerShellPaths)
+            {
+                if (File.Exists(path))
+                {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
     }
 }
diff --git a/linker.tun/LinkerTunDeviceAdapter.cs b/linker.tun/LinkerTunDeviceAdapter.cs
index 364c0959..93dbe7f1 100644
--- a/linker.tun/LinkerTunDeviceAdapter.cs
+++ b/linker.tun/LinkerTunDeviceAdapter.cs
@@ -120,9 +120,15 @@ namespace linker.tun
                 error = $"shutdown are operating";
                 return false;
             }
-            cancellationTokenSource?.Cancel();
-            linkerTunDevice?.Shutdown();
-            linkerTunDevice?.RemoveNat(out error);
+            try
+            {
+                cancellationTokenSource?.Cancel();
+                linkerTunDevice?.Shutdown();
+                linkerTunDevice?.RemoveNat(out error);
+            }
+            catch (Exception)
+            {
+            }
 
             error = string.Empty;
             Interlocked.Exchange(ref operating, 0);
diff --git a/linker.tun/LinkerWinTunDevice.cs b/linker.tun/LinkerWinTunDevice.cs
index d233e720..21f697d5 100644
--- a/linker.tun/LinkerWinTunDevice.cs
+++ b/linker.tun/LinkerWinTunDevice.cs
@@ -126,7 +126,14 @@ namespace linker.tun
         public void RemoveNat(out string error)
         {
             error = string.Empty;
-            CommandHelper.PowerShell(string.Empty, new string[] { $"Remove-NetNat -Name {Name}" });
+            try
+            {
+                CommandHelper.PowerShell(string.Empty, new string[] { $"Remove-NetNat -Name {Name}" });
+            }
+            catch (Exception ex)
+            {
+                error = ex.Message;
+            }
         }
 
         public void AddRoute(LinkerTunDeviceRouteItem[] ips, IPAddress ip, bool gateway)
diff --git a/linker/plugins/tuntap/TuntapTransfer.cs b/linker/plugins/tuntap/TuntapTransfer.cs
index 24411d8d..9514740f 100644
--- a/linker/plugins/tuntap/TuntapTransfer.cs
+++ b/linker/plugins/tuntap/TuntapTransfer.cs
@@ -44,13 +44,11 @@ namespace linker.plugins.tuntap
             this.config = config;
             this.tuntapProxy = tuntapProxy;
             this.runningConfig = runningConfig;
-
             linkerTunDeviceAdapter.Initialize(deviceName, tuntapProxy);
             linkerTunDeviceAdapter.Shutdown();
             linkerTunDeviceAdapter.Clear();
             AppDomain.CurrentDomain.ProcessExit += (s, e) => linkerTunDeviceAdapter.Shutdown();
             Console.CancelKeyPress += (s, e) => linkerTunDeviceAdapter.Shutdown();
-
             clientSignInState.NetworkFirstEnabledHandle += Initialize;
 
         }
diff --git a/linker/startup/StartupTransfer.cs b/linker/startup/StartupTransfer.cs
index fa48fda5..377bcb05 100644
--- a/linker/startup/StartupTransfer.cs
+++ b/linker/startup/StartupTransfer.cs
@@ -89,9 +89,15 @@ namespace linker.startup
             foreach (var startup in startups)
             {
                 if (config.Data.Common.Modes.Contains("client"))
+                {
+                    LoggerHelper.Instance.Warning($"add startup {startup.Name} client");
                     startup.AddClient(serviceCollection, config, assemblies);
+                }
                 if (config.Data.Common.Modes.Contains("server"))
+                {
+                    LoggerHelper.Instance.Warning($"add startup {startup.Name} server");
                     startup.AddServer(serviceCollection, config, assemblies);
+                }
             }
         }
 
@@ -106,9 +112,15 @@ namespace linker.startup
             foreach (var startup in startups)
             {
                 if (config.Data.Common.Modes.Contains("client"))
+                {
+                    LoggerHelper.Instance.Warning($"use startup {startup.Name} client");
                     startup.UseClient(serviceProvider, config, assemblies);
+                }
                 if (config.Data.Common.Modes.Contains("server"))
+                {
+                    LoggerHelper.Instance.Warning($"use startup {startup.Name} server");
                     startup.UseServer(serviceProvider, config, assemblies);
+                }
             }
         }
     }