diff --git a/Core/AppWindow.cs b/Core/AppWindow.cs
index 1b94b71b..27bf6ae6 100644
--- a/Core/AppWindow.cs
+++ b/Core/AppWindow.cs
@@ -110,7 +110,6 @@ public bool IsAltTabWindow()
             if (IsAppWindow()) return true;
             if (IsToolWindow()) return false;
             if (IsNoActivate()) return false;
-            if (!IsLastActiveVisiblePopup()) return false;
             if (!IsOwnerOrOwnerNotVisible()) return false;
 
             return true;
@@ -137,12 +136,6 @@ private bool IsNoActivate()
             return (ExtendedStyle & WindowExStyleFlags.NOACTIVATE) == WindowExStyleFlags.NOACTIVATE;
         }
 
-        private bool IsLastActiveVisiblePopup()
-        {
-            var lastActiveVisiblePopup = GetLastActiveVisiblePopup();
-            return  new AppWindow(lastActiveVisiblePopup).IsToolWindow() || lastActiveVisiblePopup == HWnd;
-        }
-
         private IntPtr GetLastActiveVisiblePopup()
         {
             // Which windows appear in the Alt+Tab list? -Raymond Chen