diff --git a/src/Update/AnimatedGifWindow.cs b/src/Update/AnimatedGifWindow.cs
new file mode 100644
index 000000000..b133cca89
--- /dev/null
+++ b/src/Update/AnimatedGifWindow.cs
@@ -0,0 +1,97 @@
+#if !MONO
+using System;
+using System.IO;
+using System.Reflection;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Shell;
+using WpfAnimatedGif;
+
+namespace Squirrel.Update
+{
+    public class AnimatedGifWindow : Window
+    {
+        public AnimatedGifWindow()
+        {
+            var img = new Image();
+            var src = default(BitmapImage);
+
+            var source = Path.Combine(
+                Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location),
+                "background.gif");
+
+            if (File.Exists(source)) {
+                src = new BitmapImage();
+                src.BeginInit();
+                src.StreamSource = File.OpenRead(source);
+                src.EndInit();
+            
+                ImageBehavior.SetAnimatedSource(img, src);
+                this.Content = img;
+                this.Width = src.Width;
+                this.Height = src.Height;
+            }
+                        
+            this.AllowsTransparency = true;
+            this.WindowStyle = WindowStyle.None;
+            this.WindowStartupLocation = WindowStartupLocation.CenterScreen;
+            this.ShowInTaskbar = true;
+            this.Topmost = true;
+            this.TaskbarItemInfo = new TaskbarItemInfo {
+                ProgressState = TaskbarItemProgressState.Normal
+            };
+            this.Title = "Installing...";
+            this.Background = new SolidColorBrush(Color.FromArgb(0, 0, 0, 0));
+        }
+
+        public static void ShowWindow(TimeSpan initialDelay, CancellationToken token, ProgressSource progressSource)
+        {
+            var wnd = default(AnimatedGifWindow);
+
+            var thread = new Thread(() => {
+                if (token.IsCancellationRequested) return;
+
+                try {
+                    Task.Delay(initialDelay, token).ContinueWith(t => { return true; }).Wait();
+                } catch (Exception) {
+                    return;
+                }
+
+                wnd = new AnimatedGifWindow();
+                wnd.Show();
+
+                Task.Delay(TimeSpan.FromSeconds(5.0), token).ContinueWith(t => {
+                    if (t.IsCanceled) return;
+                    wnd.Dispatcher.BeginInvoke(new Action(() => wnd.Topmost = false));
+                });
+
+                token.Register(() => wnd.Dispatcher.BeginInvoke(new Action(wnd.Close)));
+                EventHandler<int> progressSourceOnProgress = ((sender, p) =>
+                    wnd.Dispatcher.BeginInvoke(
+                        new Action(() => wnd.TaskbarItemInfo.ProgressValue = p/100.0)));
+                progressSource.Progress += progressSourceOnProgress;
+                try {
+                    (new Application()).Run(wnd);
+                } finally {
+                    progressSource.Progress -= progressSourceOnProgress;
+                }
+            });
+
+            thread.SetApartmentState(ApartmentState.STA);
+            thread.Start();
+        }
+
+        protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
+        {
+            base.OnMouseLeftButtonDown(e);
+            this.DragMove();
+        }
+    }
+}
+
+#endif
\ No newline at end of file