diff --git a/Flow.Launcher/SettingWindow.xaml.cs b/Flow.Launcher/SettingWindow.xaml.cs
index 054c60c8a..987c9cbf9 100644
--- a/Flow.Launcher/SettingWindow.xaml.cs
+++ b/Flow.Launcher/SettingWindow.xaml.cs
@@ -179,8 +179,8 @@ public partial class SettingWindow
         // Ensure window does not exceed screen boundaries
         top = Math.Max(top, SystemParameters.VirtualScreenTop);
         left = Math.Max(left, SystemParameters.VirtualScreenLeft);
-        top = Math.Min(top, SystemParameters.VirtualScreenHeight - ActualHeight);
-        left = Math.Min(left, SystemParameters.VirtualScreenWidth - ActualWidth);
+        top = Math.Min(top, SystemParameters.VirtualScreenTop + SystemParameters.VirtualScreenHeight - ActualHeight);
+        left = Math.Min(left, SystemParameters.VirtualScreenLeft + SystemParameters.VirtualScreenWidth - ActualWidth);
 
         Top = top;
         Left = left;
@@ -191,23 +191,19 @@ public partial class SettingWindow
         // Adjust window position if it exceeds screen boundaries
         top = Math.Max(top, SystemParameters.VirtualScreenTop);
         left = Math.Max(left, SystemParameters.VirtualScreenLeft);
-        top = Math.Min(top, SystemParameters.VirtualScreenHeight - ActualHeight);
-        left = Math.Min(left, SystemParameters.VirtualScreenWidth - ActualWidth);
+        top = Math.Min(top, SystemParameters.VirtualScreenTop + SystemParameters.VirtualScreenHeight - ActualHeight);
+        left = Math.Min(left, SystemParameters.VirtualScreenLeft + SystemParameters.VirtualScreenWidth - ActualWidth);
     }
 
     private static bool IsPositionValid(double top, double left)
     {
-        foreach (var screen in MonitorInfo.GetDisplayMonitors())
-        {
-            var workingArea = screen.WorkingArea;
-
-            if (left >= workingArea.Left && left < workingArea.Right &&
-                top >= workingArea.Top && top < workingArea.Bottom)
-            {
-                return true;
-            }
-        }
-        return false;
+        // Use SystemParameters (DIP units) to match the coordinate system of Window.Top/Left.
+        // MonitorInfo.WorkingArea uses physical pixels which can differ from DIP units when DPI
+        // scaling is active, leading to incorrect results on high-DPI or mixed-DPI setups.
+        return left >= SystemParameters.VirtualScreenLeft &&
+               left < SystemParameters.VirtualScreenLeft + SystemParameters.VirtualScreenWidth &&
+               top >= SystemParameters.VirtualScreenTop &&
+               top < SystemParameters.VirtualScreenTop + SystemParameters.VirtualScreenHeight;
     }
 
     private double WindowLeft()