diff --git a/OPENSSL-GUIDE b/OPENSSL-GUIDE
deleted file mode 100644
index 42eaa8fe..00000000
--- a/OPENSSL-GUIDE
+++ /dev/null
@@ -1,15 +0,0 @@
-OpenSSL library guide for VS2017
-
-# Read NOTES.WIN and NOTES.PERL
-
-# use Visual Studio native tools command prompt
-# use activeperl, install NASM assembler
-ppm install dmake
-
-# Win32 x86
-set PATH=D:\NASM-32;%PATH%
-perl Configure VC-WIN32 --release --prefix=C:\Users\home\Downloads\openssl-1.1.0g\x86-build --openssldir=C:\Users\home\Downloads\openssl-1.1.0g\x86-install
-nmake
-nmake test
-# to rebuild
-nmake distclean
diff --git a/appveyor.yml b/appveyor.yml
index 3086bd28..bc8cb60d 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -114,7 +114,7 @@ after_build:
         $text += 'SHA-256' + $newLine
         $text += (Get-FileHash $file -Algorithm SHA256).Hash + $newLine
         $text += 'SHA-512' + $newLine
-        $text += (Get-FileHash $file -Algorithm SHA512).Hash
+        $text += (Get-FileHash $file -Algorithm SHA512).Hash + $newLine
         return $text
     }
 
diff --git a/shadowsocks-csharp/Controller/System/ProtocolHandler.cs b/shadowsocks-csharp/Controller/System/ProtocolHandler.cs
index 2a0112cb..35bc4757 100644
--- a/shadowsocks-csharp/Controller/System/ProtocolHandler.cs
+++ b/shadowsocks-csharp/Controller/System/ProtocolHandler.cs
@@ -20,7 +20,6 @@ namespace Shadowsocks.Controller
         // see https://stackoverflow.com/questions/12945805/odd-c-sharp-path-issue
         private static readonly string ExecutablePath = Assembly.GetEntryAssembly().Location;
 
-        // TODO: Elevate when necessary
         public static bool Set(bool enabled)
         {
             RegistryKey ssURLAssociation = null;
diff --git a/shadowsocks-csharp/Program.cs b/shadowsocks-csharp/Program.cs
index 6674fd72..872e2f2a 100755
--- a/shadowsocks-csharp/Program.cs
+++ b/shadowsocks-csharp/Program.cs
@@ -26,32 +26,17 @@ namespace Shadowsocks
         public static MenuViewController MenuController { get; private set; }
         public static string[] Args { get; private set; }
 
-        [System.Runtime.InteropServices.DllImport("user32.dll")]
-        private static extern bool SetProcessDPIAware();
-
         /// <summary>
         /// 应用程序的主入口点。
         /// </summary>
-        /// </summary>
         [STAThread]
         static void Main(string[] args)
         {
             // todo: initialize the NLog configuartion
             Model.NLogConfig.TouchAndApplyNLogConfig();
 
-            // .NET Framework 4.7.2 on Win7 compatibility
-            System.Net.ServicePointManager.SecurityProtocol |=
-                System.Net.SecurityProtocolType.Tls | System.Net.SecurityProtocolType.Tls11 | System.Net.SecurityProtocolType.Tls12;
-
             // store args for further use
             Args = args;
-            // Check OS since we are using dual-mode socket
-            if (!Utils.IsWinVistaOrHigher())
-            {
-                MessageBox.Show(I18N.GetString("Unsupported operating system, use Windows Vista at least."),
-                "Shadowsocks Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
-                return;
-            }
 
             string pipename = $"Shadowsocks\\{Application.StartupPath.GetHashCode()}";
             string addedUrl = null;
@@ -125,7 +110,9 @@ namespace Shadowsocks
             Application.SetCompatibleTextRenderingDefault(false);
             AutoStartup.RegisterForRestart(true);
 
-            Directory.SetCurrentDirectory(Application.StartupPath);
+            // See https://github.com/dotnet/runtime/issues/13051
+            // we have to do this for self-contained executables
+            Directory.SetCurrentDirectory(Path.GetDirectoryName(Process.GetCurrentProcess().MainModule.FileName));
 
 #if DEBUG
             // truncate privoxy log file while debugging