diff --git a/Form1.Designer.cs b/Form1.Designer.cs
index 765bee1..b4b0f2a 100644
--- a/Form1.Designer.cs
+++ b/Form1.Designer.cs
@@ -71,6 +71,7 @@
             this.MaximizeBox = false;
             this.MinimizeBox = false;
             this.Name = "Update";
+            this.ShowInTaskbar = false;
             this.Text = "自动更新";
             this.TopMost = true;
             this.Load += new System.EventHandler(this.Update_Load);
diff --git a/Form1.cs b/Form1.cs
index 92700d0..c74c221 100644
--- a/Form1.cs
+++ b/Form1.cs
@@ -112,7 +112,13 @@ namespace CheckDownload
                 UpdateStatus("下载在线MD5文件并读取...");
                 OssClient client = new OssClient(OssEndpoint, OssAccessKeyId, OssAccessKeySecret);
                 var onlineData = ReadOnlineMd5File(client, OssBucketName, Md5File);
-                if (!ValidateOnlineData(onlineData.Version, onlineData.Md5, onlineData.Data)) return;
+                if (!ValidateOnlineData(onlineData.Version, onlineData.Md5, onlineData.Data))
+                {
+                    UpdateStatus("在线MD5文件无效");
+                    await Task.Delay(3000);
+                    this.Close();
+                    return;
+                }
 
                 UpdateStatus("比较本地和在线MD5文件...");
                 var compareResult = CompareMd5Data(onlineData.Data);