diff --git a/ILSpy/ILSpy.csproj b/ILSpy/ILSpy.csproj
index 7779aae12..2253f057c 100644
--- a/ILSpy/ILSpy.csproj
+++ b/ILSpy/ILSpy.csproj
@@ -72,6 +72,7 @@
       <RequiredTargetFramework>3.5</RequiredTargetFramework>
     </Reference>
     <Reference Include="System.Drawing" />
+    <Reference Include="System.Windows.Forms" />
     <Reference Include="System.Xaml">
       <RequiredTargetFramework>4.0</RequiredTargetFramework>
     </Reference>
diff --git a/ILSpy/MainWindow.xaml.cs b/ILSpy/MainWindow.xaml.cs
index 25de2d302..000aa5e6a 100644
--- a/ILSpy/MainWindow.xaml.cs
+++ b/ILSpy/MainWindow.xaml.cs
@@ -31,7 +31,6 @@ using System.Windows.Input;
 using System.Windows.Interop;
 using System.Windows.Media;
 using System.Windows.Media.Imaging;
-
 using ICSharpCode.ILSpy.Debugger;
 using ICSharpCode.ILSpy.TextView;
 using ICSharpCode.ILSpy.TreeNodes;
@@ -78,12 +77,6 @@ namespace ICSharpCode.ILSpy
 			this.Icon = new BitmapImage(new Uri("pack://application:,,,/ILSpy;component/images/ILSpy.ico"));
 			
 			this.DataContext = sessionSettings;
-			this.Left = sessionSettings.WindowBounds.Left;
-			this.Top = sessionSettings.WindowBounds.Top;
-			this.Width = sessionSettings.WindowBounds.Width;
-			this.Height = sessionSettings.WindowBounds.Height;
-			// TODO: validate bounds (maybe a monitor was removed...)
-			this.WindowState = sessionSettings.WindowState;
 			
 			InitializeComponent();
 			App.CompositionContainer.ComposeParts(this);
@@ -102,6 +95,14 @@ namespace ICSharpCode.ILSpy
 			this.Loaded += new RoutedEventHandler(MainWindow_Loaded);
 		}
 		
+		void SetWindowBounds(Rect bounds)
+		{
+			this.Left = bounds.Left;
+			this.Top = bounds.Top;
+			this.Width = bounds.Width;
+			this.Height = bounds.Height;
+		}
+		
 		#region Toolbar extensibility
 		[ImportMany("ToolbarCommand", typeof(ICommand))]
 		Lazy<ICommand, IToolbarCommandMetadata>[] toolbarCommands = null;
@@ -187,10 +188,26 @@ namespace ICSharpCode.ILSpy
 		protected override void OnSourceInitialized(EventArgs e)
 		{
 			base.OnSourceInitialized(e);
-			HwndSource source = PresentationSource.FromVisual(this) as HwndSource;
-			if (source != null) {
-				source.AddHook(WndProc);
+			PresentationSource source = PresentationSource.FromVisual(this);
+			HwndSource hwndSource = source as HwndSource;
+			if (hwndSource != null) {
+				hwndSource.AddHook(WndProc);
 			}
+			// Validate and Set Window Bounds
+			Rect bounds = Rect.Transform(sessionSettings.WindowBounds, source.CompositionTarget.TransformToDevice);
+			var boundsRect = new System.Drawing.Rectangle((int)bounds.Left, (int)bounds.Top, (int)bounds.Width, (int)bounds.Height);
+			bool boundsOK = false;
+			foreach (var screen in System.Windows.Forms.Screen.AllScreens) {
+				var intersection = System.Drawing.Rectangle.Intersect(boundsRect, screen.WorkingArea);
+				if (intersection.Width > 10 && intersection.Height > 10)
+					boundsOK = true;
+			}
+			if (boundsOK)
+				SetWindowBounds(sessionSettings.WindowBounds);
+			else
+				SetWindowBounds(SessionSettings.DefaultWindowBounds);
+			
+			this.WindowState = sessionSettings.WindowState;
 		}
 		
 		unsafe IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
diff --git a/ILSpy/SessionSettings.cs b/ILSpy/SessionSettings.cs
index 989538020..433d4bf96 100644
--- a/ILSpy/SessionSettings.cs
+++ b/ILSpy/SessionSettings.cs
@@ -47,7 +47,7 @@ namespace ICSharpCode.ILSpy
 			}
 			
 			this.WindowState = FromString((string)doc.Element("WindowState"), WindowState.Normal);
-			this.WindowBounds = FromString((string)doc.Element("WindowBounds"), new Rect(10, 10, 750, 550));
+			this.WindowBounds = FromString((string)doc.Element("WindowBounds"), DefaultWindowBounds);
 			this.SplitterPosition = FromString((string)doc.Element("SplitterPosition"), 0.4);
 			this.TopPaneSplitterPosition = FromString((string)doc.Element("TopPaneSplitterPosition"), 0.3);
 			this.BottomPaneSplitterPosition = FromString((string)doc.Element("BottomPaneSplitterPosition"), 0.3);
@@ -69,6 +69,7 @@ namespace ICSharpCode.ILSpy
 		
 		public WindowState WindowState = WindowState.Normal;
 		public Rect WindowBounds;
+		internal static Rect DefaultWindowBounds =  new Rect(10, 10, 750, 550);
 		/// <summary>
 		/// position of the left/right splitter
 		/// </summary>