diff --git a/.gitignore b/.gitignore
index 3c8f6a9..ce002e8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,4 +11,5 @@ packages/
 
 .DS_Store
 
-publish/
\ No newline at end of file
+publish/
+artifacts/
\ No newline at end of file
diff --git a/sample/WeChatOcr.Sample/MainWindow.xaml.cs b/sample/WeChatOcr.Sample/MainWindow.xaml.cs
index 32cccf9..e389932 100644
--- a/sample/WeChatOcr.Sample/MainWindow.xaml.cs
+++ b/sample/WeChatOcr.Sample/MainWindow.xaml.cs
@@ -8,7 +8,6 @@
 using System.Windows.Input;
 using ScreenGrab.Extensions;
 using Wpf.Ui.Tray.Controls;
-using System.Windows.Media.Imaging;
 using System.Text;
 
 namespace WeChatOcr.Sample;
@@ -108,6 +107,7 @@ private void Ocr_Click(object sender, RoutedEventArgs e)
             ResultTb.Text = "Please wait for the previous OCR operation to complete.";
             return;
         }
+        _tcs = new TaskCompletionSource<string>();
         try
         {
             var bytes = ImageUtilities.ConvertBitmap2Bytes(bitmap, ImageFormat.Png);
diff --git a/src/WeChatOcr/ImageOcr.cs b/src/WeChatOcr/ImageOcr.cs
index 30c97ec..61417f1 100644
--- a/src/WeChatOcr/ImageOcr.cs
+++ b/src/WeChatOcr/ImageOcr.cs
@@ -1,4 +1,5 @@
-using System.Runtime.InteropServices;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
 
 namespace WeChatOcr;
 
@@ -14,7 +15,7 @@ public ImageOcr(string? path = default)
         var wechatDir = Utilities.GetWeChatDir(path) ??
                         throw new Exception($"get wechat path failed: {path ?? "NULL"}");
 
-        Utilities.CopyMmmojoDll(wechatDir, AppDomain.CurrentDomain.BaseDirectory);
+        Utilities.CopyMmmojoDll(wechatDir);
 
         var ocrPtr = GCHandle.ToIntPtr(GCHandle.Alloc(_ocrManager));
         _ocrManager = (GCHandle.FromIntPtr(ocrPtr).Target as OcrManager)!;
@@ -45,7 +46,7 @@ public void Run(string imagePath, Action<string, WeChatOcrResult?>? callback)
             }
             catch (Exception ex)
             {
-                Console.WriteLine(ex.Message);
+                Debug.WriteLine(ex.Message);
                 return;
             }
     }
diff --git a/src/WeChatOcr/Utilities.cs b/src/WeChatOcr/Utilities.cs
index eb662c7..2cf48bc 100644
--- a/src/WeChatOcr/Utilities.cs
+++ b/src/WeChatOcr/Utilities.cs
@@ -9,8 +9,9 @@ public partial class Utilities
     ///     微信默认安装目录
     /// </summary>
     private const string WeChatDefaultPath = @"C:\Program Files\Tencent\WeChat";
-    private const string MmmojoDll = "mmmojo.dll";
-    private const string Mmmojo64Dll = "mmmojo_64.dll";
+
+    private const string MmMojoDll = "mmmojo.dll";
+    private const string MmMojo64Dll = "mmmojo_64.dll";
 
     /// <summary>
     ///     获取微信安装目录
@@ -67,17 +68,47 @@ public static void WriteBytesToFile(string filePath, byte[] bytes)
     /// <summary>
     ///     复制微信安装目录下的mmmojo.dll、mmmojo_64.dll到软件目录
     /// </summary>
-    /// <param name="wechatDir"></param>
-    /// <param name="targetPath">目标目录</param>
-    public static void CopyMmmojoDll(string wechatDir, string targetPath)
+    /// <param name="wechatFullDir">
+    ///     微信完整路径包含版本号
+    ///     * C:\Program Files\Tencent\WeChat\[3.9.12.11]
+    /// </param>
+    public static void CopyMmmojoDll(string wechatFullDir)
+    {
+        var targetPath = AppDomain.CurrentDomain.BaseDirectory;
+        var mmMojoFullPath = Path.Combine(wechatFullDir, MmMojoDll);
+        var mmMojo64FullPath = Path.Combine(wechatFullDir, MmMojo64Dll);
+        var targetMmMojoFullPath = Path.Combine(targetPath, MmMojoDll);
+        var targetMmMojo64FullPath = Path.Combine(targetPath, MmMojo64Dll);
+        if (!File.Exists(targetMmMojoFullPath))
+            File.Copy(mmMojoFullPath, targetMmMojoFullPath);
+        if (!File.Exists(targetMmMojo64FullPath))
+            File.Copy(mmMojo64FullPath, targetMmMojo64FullPath);
+    }
+
+    /// <summary>
+    ///     移除软件目录下的mmmojo.dll、mmmojo_64.dll
+    /// </summary>
+    /// <param name="error"></param>
+    public static bool RemoveMmmojoDll(out string error)
     {
-        var mmmojoFullPath = Path.Combine(wechatDir, MmmojoDll);
-        var mmmojo64FullPath = Path.Combine(wechatDir, Mmmojo64Dll);
-        var targetMmmojoFullPath = Path.Combine(targetPath, MmmojoDll);
-        var targetMmmojo64FullPath = Path.Combine(targetPath, Mmmojo64Dll);
-        if (!File.Exists(targetMmmojoFullPath))
-            File.Copy(mmmojoFullPath, targetMmmojoFullPath);
-        if (!File.Exists(targetMmmojo64FullPath))
-            File.Copy(mmmojo64FullPath, targetMmmojo64FullPath);
+        var ret = true;
+        error = string.Empty;
+        var targetPath = AppDomain.CurrentDomain.BaseDirectory;
+        var targetMmMojoFullPath = Path.Combine(targetPath, MmMojoDll);
+        var targetMmMojo64FullPath = Path.Combine(targetPath, MmMojo64Dll);
+        try
+        {
+            if (File.Exists(targetMmMojoFullPath))
+                File.Delete(targetMmMojoFullPath);
+            if (File.Exists(targetMmMojo64FullPath))
+                File.Delete(targetMmMojo64FullPath);
+        }
+        catch (Exception ex)
+        {
+            error = ex.Message;
+            ret = false;
+        }
+
+        return ret;
     }
 }
\ No newline at end of file