diff --git a/SpeedTest/Community.PowerToys.Run.Plugin.SpeedTest/LoadingWindow.xaml.cs b/SpeedTest/Community.PowerToys.Run.Plugin.SpeedTest/LoadingWindow.xaml.cs
index fc98b46..805870d 100644
--- a/SpeedTest/Community.PowerToys.Run.Plugin.SpeedTest/LoadingWindow.xaml.cs
+++ b/SpeedTest/Community.PowerToys.Run.Plugin.SpeedTest/LoadingWindow.xaml.cs
@@ -7,6 +7,8 @@
 using System.Windows.Threading;
 using System.Windows.Controls;
 using System.Windows.Media;
+using System.Threading;
+using System.Windows.Input;
 
 namespace Community.PowerToys.Run.Plugin.SpeedTest
 {
@@ -15,6 +17,7 @@ public partial class LoadingWindow : Window
         private TestStage _currentStage = TestStage.Connecting;
         private DispatcherTimer _dotAnimationTimer;
         private bool _isCompleted = false;
+        private readonly CancellationTokenSource _cancellationTokenSource;
 
         public enum TestStage
         {
@@ -26,10 +29,22 @@ public enum TestStage
             Error = 5
         }
 
-        public LoadingWindow()
+        public LoadingWindow(CancellationTokenSource cancellationTokenSource = null)
         {
             InitializeComponent();
+            _cancellationTokenSource = cancellationTokenSource;
             Loaded += LoadingWindow_Loaded;
+            PreviewKeyDown += LoadingWindow_PreviewKeyDown;
+        }
+
+        private void LoadingWindow_PreviewKeyDown(object sender, KeyEventArgs e)
+        {
+            if (e.Key == Key.Escape)
+            {
+                _cancellationTokenSource?.Cancel();
+                CloseWithAnimation();
+                e.Handled = true;
+            }
         }
 
         private void LoadingWindow_Loaded(object sender, RoutedEventArgs e)
diff --git a/SpeedTest/Community.PowerToys.Run.Plugin.SpeedTest/Main.cs b/SpeedTest/Community.PowerToys.Run.Plugin.SpeedTest/Main.cs
index 793bf1c..2c2d52d 100644
--- a/SpeedTest/Community.PowerToys.Run.Plugin.SpeedTest/Main.cs
+++ b/SpeedTest/Community.PowerToys.Run.Plugin.SpeedTest/Main.cs
@@ -335,7 +335,7 @@ private async Task RunSpeedTestAsync()
             LoadingWindow loadingWindow = null;
             Application.Current.Dispatcher.Invoke(() =>
             {
-                loadingWindow = new LoadingWindow();
+                loadingWindow = new LoadingWindow(_cancellationTokenSource);
                 _currentLoadingWindow = loadingWindow;
                 loadingWindow.Show();
                 loadingWindow.UpdateStage(LoadingWindow.TestStage.Connecting);
@@ -349,7 +349,13 @@ private async Task RunSpeedTestAsync()
 
                 if (token.IsCancellationRequested)
                 {
-                    Application.Current.Dispatcher.Invoke(() => loadingWindow?.CloseWithAnimation());
+                    Application.Current.Dispatcher.Invoke(() =>
+                    {
+                        if (loadingWindow?.IsVisible == true)
+                        {
+                            loadingWindow.CloseWithAnimation();
+                        }
+                    });
                     if (_showNotifications)
                     {
                         _context.API.ShowMsg("Speed Test", "🛑 Test was canceled", _iconPath);
@@ -361,7 +367,10 @@ private async Task RunSpeedTestAsync()
                 {
                     Application.Current.Dispatcher.Invoke(() =>
                     {
-                        loadingWindow?.CloseWithAnimation();
+                        if (loadingWindow?.IsVisible == true)
+                        {
+                            loadingWindow.CloseWithAnimation();
+                        }
 
                         try
                         {
@@ -388,7 +397,13 @@ private async Task RunSpeedTestAsync()
             }
             catch (OperationCanceledException)
             {
-                Application.Current.Dispatcher.Invoke(() => loadingWindow?.CloseWithAnimation());
+                Application.Current.Dispatcher.Invoke(() =>
+                {
+                    if (loadingWindow?.IsVisible == true)
+                    {
+                        loadingWindow.CloseWithAnimation();
+                    }
+                });
                 if (_showNotifications)
                 {
                     _context.API.ShowMsg("Speed Test", "🛑 Test was canceled", _iconPath);
@@ -404,11 +419,14 @@ private async Task RunSpeedTestAsync()
                     {
                         Interval = TimeSpan.FromSeconds(3)
                     };
-                    timer.Tick += (s, e) =>
-                    {
-                        timer.Stop();
-                        loadingWindow?.CloseWithAnimation();
-                    };
+                        timer.Tick += (s, e) =>
+                        {
+                            timer.Stop();
+                            if (loadingWindow?.IsVisible == true)
+                            {
+                                loadingWindow.CloseWithAnimation();
+                            }
+                        };
                     timer.Start();
                 });
 
@@ -458,6 +476,19 @@ private async Task<SpeedTestResult> ExecuteSpeedTestCLI(bool showUI = true, Load
             };
 
             using var process = new Process { StartInfo = psi };
+            using var _ = token.Register(() =>
+            {
+                try
+                {
+                    if (!process.HasExited)
+                    {
+                        process.Kill(true);
+                    }
+                }
+                catch
+                {
+                }
+            });
 
             process.OutputDataReceived += (sender, e) =>
             {
diff --git a/SpeedTest/Community.PowerToys.Run.Plugin.SpeedTest/ResultsWindow.xaml.cs b/SpeedTest/Community.PowerToys.Run.Plugin.SpeedTest/ResultsWindow.xaml.cs
index 2c38b61..a108520 100644
--- a/SpeedTest/Community.PowerToys.Run.Plugin.SpeedTest/ResultsWindow.xaml.cs
+++ b/SpeedTest/Community.PowerToys.Run.Plugin.SpeedTest/ResultsWindow.xaml.cs
@@ -7,6 +7,7 @@
 using System;
 using System.Windows.Interop;
 using System.Runtime.InteropServices;
+using System.Windows.Input;
 
 namespace Community.PowerToys.Run.Plugin.SpeedTest
 {
@@ -30,6 +31,7 @@ public ResultsWindow(SpeedTestResult result)
 
             // Flash the window when it's loaded
             this.Loaded += (s, e) => FlashWindow(new WindowInteropHelper(this).Handle, true);
+            PreviewKeyDown += ResultsWindow_PreviewKeyDown;
 
             #if DEBUG
             // Log the result data for debugging purposes.
@@ -38,6 +40,15 @@ public ResultsWindow(SpeedTestResult result)
             #endif
         }
 
+        private void ResultsWindow_PreviewKeyDown(object sender, KeyEventArgs e)
+        {
+            if (e.Key == Key.Escape)
+            {
+                Close();
+                e.Handled = true;
+            }
+        }
+
         private void ApplyTheme()
         {
             bool isDarkTheme = false;
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 3005ebc..a917e15 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -5,6 +5,11 @@ All notable changes to the PowerToys Run SpeedTest Plugin will be documented in
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Added
+- Pressing `Esc` now cancels a running speed test or closes the results window
+
 ## [1.0.5] - 2025-01-14
 
 ### Added
diff --git a/docs/README.md b/docs/README.md
index d0c74e2..7100d77 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -109,10 +109,11 @@
    - Configure clipboard settings in PowerToys settings if needed
 
 ## 🚀 Usage     
-- Open PowerToys Run (`Alt+Space`)    
+- Open PowerToys Run (`Alt+Space`)
 - Type `spt` and select `Run Speed Test`
 - Enjoy the beautiful loading animation and view real-time progress
 - Results window will flash when complete to get your attention
+- Press `Esc` at any time to cancel the test or close the results window
 - Configure clipboard settings in PowerToys settings
 - Click the result URL to view/share your result online