Add admin privilege checking

src/KFmaintenance/Properties/Resources.resx

@@ -152,4 +152,7 @@
   <data name="KFmaintenance" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>..\Resources\KFmaintenance.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
   </data>
+  <data name="NotElevatedMessage" xml:space="preserve">
+    <value>Jalankan aplikasi sebagai Administrator terlebih dahulu.</value>
+  </data>
 </root>

src/KFmaintenance/Views/StartupForm.cs

@@ -23,6 +23,7 @@ public partial class StartupForm : Form
         private readonly ISystemInfoService _infoService = Program.Container.Resolve<ISystemInfoService>();
         private readonly IRemoteShutdownServer _remoteService = Program.Container.Resolve<IRemoteShutdownServer>();
         private readonly ISystemTweaker _systemTweaker = Program.Container.Resolve<ISystemTweaker>();
+        private readonly IProcessManager _processManager = Program.Container.Resolve<IProcessManager>();
         private readonly IPathManager _pathManager = Program.Container.Resolve<IPathManager>();
         private readonly IFormService _formService = Program.Container.Resolve<IFormService>();
         private DateTime _lastShutdownRequest;
@@ -146,6 +147,13 @@ private void cmdSaveSettings_Click(object sender, EventArgs e)
 
         private void cmdSaveRegistry_Click(object sender, EventArgs e)
         {
+            if (!_processManager.IsProcessElevated())
+            {
+                MessageBox.Show(Resources.NotElevatedMessage, Resources.AppName, MessageBoxButtons.OK,
+                        MessageBoxIcon.Exclamation);
+                return;
+            }
+
             using (var frm = Program.Container.Resolve<AuthForm>())
             {
                 var result = frm.ShowDialog();