diff --git a/Ryujinx.Ava/AppHost.cs b/Ryujinx.Ava/AppHost.cs
index 3d4c6cde8..a016ebd5a 100644
--- a/Ryujinx.Ava/AppHost.cs
+++ b/Ryujinx.Ava/AppHost.cs
@@ -60,7 +60,7 @@ namespace Ryujinx.Ava
 
         private const float VolumeDelta = 0.05f;
 
-        private static readonly Cursor InvisibleCursor = new Cursor(StandardCursorType.None);        
+        private static readonly Cursor InvisibleCursor = new Cursor(StandardCursorType.None);
 
         private readonly long _ticksPerFrame;
         private readonly Stopwatch _chrono;
@@ -349,7 +349,10 @@ namespace Ryujinx.Ava
 
             _isActive = false;
 
-            _renderingThread.Join();
+            if (_renderingThread.IsAlive)
+            {
+                _renderingThread.Join();
+            }
 
             DisplaySleep.Restore();
 
@@ -378,7 +381,7 @@ namespace Ryujinx.Ava
 
             _gpuCancellationTokenSource.Cancel();
             _gpuCancellationTokenSource.Dispose();
-            
+
             _chrono.Stop();
         }
 
@@ -393,7 +396,7 @@ namespace Ryujinx.Ava
             Renderer?.MakeCurrent();
 
             Device.DisposeGpu();
-            
+
             Renderer?.MakeCurrent(null);
         }
 
@@ -417,7 +420,6 @@ namespace Ryujinx.Ava
         public async Task<bool> LoadGuestApplication()
         {
             InitializeSwitchInstance();
-
             MainWindow.UpdateGraphicsConfig();
 
             SystemVersion firmwareVersion = ContentManager.GetCurrentFirmwareVersion();
@@ -428,17 +430,16 @@ namespace Ryujinx.Ava
                 {
                     if (userError == UserError.NoFirmware)
                     {
-                        string message = string.Format(LocaleManager.Instance["DialogFirmwareInstallEmbeddedMessage"],
-                            firmwareVersion.VersionString);
-
                         UserResult result = await ContentDialogHelper.CreateConfirmationDialog(
-                            LocaleManager.Instance["DialogFirmwareNoFirmwareInstalledMessage"], message,
-                            LocaleManager.Instance["InputDialogYes"], LocaleManager.Instance["InputDialogNo"], "");
+                            LocaleManager.Instance["DialogFirmwareNoFirmwareInstalledMessage"],
+                            string.Format(LocaleManager.Instance["DialogFirmwareInstallEmbeddedMessage"], firmwareVersion.VersionString),
+                            LocaleManager.Instance["InputDialogYes"],
+                            LocaleManager.Instance["InputDialogNo"],
+                            "");
 
                         if (result != UserResult.Yes)
                         {
-                            Dispatcher.UIThread.Post(async () => await
-                                UserErrorDialog.ShowUserErrorDialog(userError, _parent));
+                            await UserErrorDialog.ShowUserErrorDialog(userError, _parent);
                             Device.Dispose();
 
                             return false;
@@ -447,8 +448,7 @@ namespace Ryujinx.Ava
 
                     if (!SetupValidator.TryFixStartApplication(ContentManager, ApplicationPath, userError, out _))
                     {
-                        Dispatcher.UIThread.Post(async () => await
-                            UserErrorDialog.ShowUserErrorDialog(userError, _parent));
+                        await UserErrorDialog.ShowUserErrorDialog(userError, _parent);
                         Device.Dispose();
 
                         return false;
@@ -461,11 +461,9 @@ namespace Ryujinx.Ava
 
                         _parent.RefreshFirmwareStatus();
 
-                        string message = string.Format(LocaleManager.Instance["DialogFirmwareInstallEmbeddedSuccessMessage"], firmwareVersion.VersionString);
-
                         await ContentDialogHelper.CreateInfoDialog(
                             string.Format(LocaleManager.Instance["DialogFirmwareInstalledMessage"], firmwareVersion.VersionString),
-                            message,
+                            string.Format(LocaleManager.Instance["DialogFirmwareInstallEmbeddedSuccessMessage"], firmwareVersion.VersionString),
                             LocaleManager.Instance["InputDialogOk"],
                             "",
                             LocaleManager.Instance["RyujinxInfo"]);
@@ -473,9 +471,7 @@ namespace Ryujinx.Ava
                 }
                 else
                 {
-                    Dispatcher.UIThread.Post(async () => await
-                        UserErrorDialog.ShowUserErrorDialog(userError, _parent));
-
+                    await UserErrorDialog.ShowUserErrorDialog(userError, _parent);
                     Device.Dispose();
 
                     return false;
@@ -514,7 +510,7 @@ namespace Ryujinx.Ava
             }
             else if (File.Exists(ApplicationPath))
             {
-                switch (System.IO.Path.GetExtension(ApplicationPath).ToLowerInvariant())
+                switch (Path.GetExtension(ApplicationPath).ToLowerInvariant())
                 {
                     case ".xci":
                         {
@@ -602,7 +598,7 @@ namespace Ryujinx.Ava
             if (Renderer.IsVulkan)
             {
                 string preferredGpu = ConfigurationState.Instance.Graphics.PreferredGpu.Value;
-                
+
                 renderer = new VulkanRenderer(Renderer.CreateVulkanSurface, VulkanHelper.GetRequiredInstanceExtensions, preferredGpu);
             }
             else
diff --git a/Ryujinx.Ava/Ui/Controls/OpenGLEmbeddedWindow.cs b/Ryujinx.Ava/Ui/Controls/OpenGLEmbeddedWindow.cs
index ce579fdfd..f32bf0415 100644
--- a/Ryujinx.Ava/Ui/Controls/OpenGLEmbeddedWindow.cs
+++ b/Ryujinx.Ava/Ui/Controls/OpenGLEmbeddedWindow.cs
@@ -49,7 +49,7 @@ namespace Ryujinx.Ava.Ui.Controls
             {
                 throw new PlatformNotSupportedException();
             }
-            
+
             var flags = OpenGLContextFlags.Compat;
             if (_graphicsDebugLevel != GraphicsDebugLevel.None)
             {
@@ -69,12 +69,12 @@ namespace Ryujinx.Ava.Ui.Controls
 
         public void MakeCurrent()
         {
-            Context.MakeCurrent(_window);
+            Context?.MakeCurrent(_window);
         }
 
         public void MakeCurrent(NativeWindowBase window)
         {
-            Context.MakeCurrent(window);
+            Context?.MakeCurrent(window);
         }
 
         public void SwapBuffers()
diff --git a/Ryujinx.Ava/Ui/Windows/MainWindow.axaml.cs b/Ryujinx.Ava/Ui/Windows/MainWindow.axaml.cs
index 0e03803ba..be4517c86 100644
--- a/Ryujinx.Ava/Ui/Windows/MainWindow.axaml.cs
+++ b/Ryujinx.Ava/Ui/Windows/MainWindow.axaml.cs
@@ -251,24 +251,29 @@ namespace Ryujinx.Ava.Ui.Windows
 
             AppHost = new AppHost(RendererControl, InputManager, path, VirtualFileSystem, ContentManager, AccountManager, _userChannelPersistence, this);
 
-            if (!AppHost.LoadGuestApplication().Result)
+            Dispatcher.UIThread.Post(async () =>
             {
-                AppHost.DisposeContext();
+                if (!await AppHost.LoadGuestApplication())
+                {
+                    AppHost.DisposeContext();
+                    AppHost = null;
 
-                return;
-            }
+                    return;
+                }
 
-            ViewModel.LoadHeading = string.IsNullOrWhiteSpace(titleName) ? string.Format(LocaleManager.Instance["LoadingHeading"], AppHost.Device.Application.TitleName) : titleName;
-            ViewModel.TitleName = string.IsNullOrWhiteSpace(titleName) ? AppHost.Device.Application.TitleName : titleName;
+                ViewModel.LoadHeading = string.IsNullOrWhiteSpace(titleName) ? string.Format(LocaleManager.Instance["LoadingHeading"], AppHost.Device.Application.TitleName) : titleName;
+                ViewModel.TitleName   = string.IsNullOrWhiteSpace(titleName) ? AppHost.Device.Application.TitleName : titleName;
 
-            SwitchToGameControl(startFullscreen);
+                SwitchToGameControl(startFullscreen);
 
-            _currentEmulatedGamePath = path;
-            Thread gameThread = new Thread(InitializeGame)
-            {
-                Name = "GUI.WindowThread"
-            };
-            gameThread.Start();
+                _currentEmulatedGamePath = path;
+
+                Thread gameThread = new(InitializeGame)
+                {
+                    Name = "GUI.WindowThread"
+                };
+                gameThread.Start();
+            });
         }
 
         private void InitializeGame()
@@ -546,10 +551,12 @@ namespace Ryujinx.Ava.Ui.Windows
         {
             ApplicationLibrary.LoadAndSaveMetaData(titleId, appMetadata =>
             {
-                DateTime lastPlayedDateTime = DateTime.Parse(appMetadata.LastPlayed);
-                double sessionTimePlayed = DateTime.UtcNow.Subtract(lastPlayedDateTime).TotalSeconds;
+                if (DateTime.TryParse(appMetadata.LastPlayed, out DateTime lastPlayedDateTime))
+                {
+                    double sessionTimePlayed = DateTime.UtcNow.Subtract(lastPlayedDateTime).TotalSeconds;
 
-                appMetadata.TimePlayed += Math.Round(sessionTimePlayed, MidpointRounding.AwayFromZero);
+                    appMetadata.TimePlayed += Math.Round(sessionTimePlayed, MidpointRounding.AwayFromZero);
+                }
             });
         }
 
diff --git a/Ryujinx.Graphics.GAL/Multithreading/ThreadedRenderer.cs b/Ryujinx.Graphics.GAL/Multithreading/ThreadedRenderer.cs
index e105a0926..7a625af38 100644
--- a/Ryujinx.Graphics.GAL/Multithreading/ThreadedRenderer.cs
+++ b/Ryujinx.Graphics.GAL/Multithreading/ThreadedRenderer.cs
@@ -422,7 +422,11 @@ namespace Ryujinx.Graphics.GAL.Multithreading
 
             // Stop the GPU thread.
             _disposed = true;
-            _gpuThread.Join();
+
+            if (_gpuThread != null && _gpuThread.IsAlive)
+            {
+                _gpuThread.Join();
+            }
 
             // Dispose the renderer.
             _baseRenderer.Dispose();
@@ -435,4 +439,4 @@ namespace Ryujinx.Graphics.GAL.Multithreading
             Sync.Dispose();
         }
     }
-}
+}
\ No newline at end of file
diff --git a/Ryujinx.Graphics.OpenGL/Queries/Counters.cs b/Ryujinx.Graphics.OpenGL/Queries/Counters.cs
index 582800c8d..ebfd899c5 100644
--- a/Ryujinx.Graphics.OpenGL/Queries/Counters.cs
+++ b/Ryujinx.Graphics.OpenGL/Queries/Counters.cs
@@ -54,4 +54,4 @@ namespace Ryujinx.Graphics.OpenGL.Queries
             }
         }
     }
-}
+}
\ No newline at end of file
diff --git a/Ryujinx.Graphics.OpenGL/Window.cs b/Ryujinx.Graphics.OpenGL/Window.cs
index 61b739b11..8f7917f91 100644
--- a/Ryujinx.Graphics.OpenGL/Window.cs
+++ b/Ryujinx.Graphics.OpenGL/Window.cs
@@ -10,6 +10,8 @@ namespace Ryujinx.Graphics.OpenGL
         private const int TextureCount = 3;
         private readonly OpenGLRenderer _renderer;
 
+        private bool _initialized;
+
         private int _width;
         private int _height;
         private int _copyFramebufferHandle;
@@ -179,6 +181,7 @@ namespace Ryujinx.Graphics.OpenGL
         public void InitializeBackgroundContext(IOpenGLContext baseContext)
         {
             BackgroundContext = new BackgroundContextWorker(baseContext);
+            _initialized = true;
         }
 
         public void CaptureFrame(int x, int y, int width, int height, bool isBgra, bool flipX, bool flipY)
@@ -193,6 +196,11 @@ namespace Ryujinx.Graphics.OpenGL
 
         public void Dispose()
         {
+            if (!_initialized)
+            {
+                return;
+            }
+
             BackgroundContext.Dispose();
 
             if (_copyFramebufferHandle != 0)
@@ -203,4 +211,4 @@ namespace Ryujinx.Graphics.OpenGL
             }
         }
     }
-}
+}
\ No newline at end of file
diff --git a/Ryujinx.Graphics.Vulkan/VulkanRenderer.cs b/Ryujinx.Graphics.Vulkan/VulkanRenderer.cs
index 3f8ebe67b..22e303294 100644
--- a/Ryujinx.Graphics.Vulkan/VulkanRenderer.cs
+++ b/Ryujinx.Graphics.Vulkan/VulkanRenderer.cs
@@ -22,6 +22,8 @@ namespace Ryujinx.Graphics.Vulkan
         private Device _device;
         private WindowBase _window;
 
+        private bool _initialized;
+
         internal FormatCapabilities FormatCapabilities { get; private set; }
         internal HardwareCapabilities Capabilities;
 
@@ -266,6 +268,8 @@ namespace Ryujinx.Graphics.Vulkan
             LoadFeatures(supportedExtensions, maxQueueCount, queueFamilyIndex);
 
             _window = new Window(this, _surface, _physicalDevice, _device);
+
+            _initialized = true;
         }
 
         public BufferHandle CreateBuffer(int size)
@@ -573,6 +577,11 @@ namespace Ryujinx.Graphics.Vulkan
 
         public unsafe void Dispose()
         {
+            if (!_initialized)
+            {
+                return;
+            }
+
             CommandBufferPool.Dispose();
             BackgroundResources.Dispose();
             _counters.Dispose();
@@ -613,4 +622,4 @@ namespace Ryujinx.Graphics.Vulkan
             Api.DestroyInstance(_instance, null);
         }
     }
-}
+}
\ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/Horizon.cs b/Ryujinx.HLE/HOS/Horizon.cs
index d2716beb6..288c308a0 100644
--- a/Ryujinx.HLE/HOS/Horizon.cs
+++ b/Ryujinx.HLE/HOS/Horizon.cs
@@ -479,7 +479,10 @@ namespace Ryujinx.HLE.HOS
 
                 AudioRendererManager.Dispose();
 
-                LibHacHorizonManager.PmClient.Fs.UnregisterProgram(LibHacHorizonManager.ApplicationClient.Os.GetCurrentProcessId().Value).ThrowIfFailure();
+                if (LibHacHorizonManager.ApplicationClient != null)
+                {
+                    LibHacHorizonManager.PmClient.Fs.UnregisterProgram(LibHacHorizonManager.ApplicationClient.Os.GetCurrentProcessId().Value).ThrowIfFailure();
+                }
 
                 KernelContext.Dispose();
             }
diff --git a/Ryujinx/Ui/MainWindow.cs b/Ryujinx/Ui/MainWindow.cs
index 3f261f4d0..9f9016b9f 100644
--- a/Ryujinx/Ui/MainWindow.cs
+++ b/Ryujinx/Ui/MainWindow.cs
@@ -735,7 +735,6 @@ namespace Ryujinx.Ui
 
                                 _emulationContext.Dispose();
                                 SwitchToGameTable();
-                                RendererWidget.Dispose();
 
                                 return;
                             }
@@ -747,7 +746,6 @@ namespace Ryujinx.Ui
 
                             _emulationContext.Dispose();
                             SwitchToGameTable();
-                            RendererWidget.Dispose();
 
                             return;
                         }
@@ -770,7 +768,6 @@ namespace Ryujinx.Ui
 
                         _emulationContext.Dispose();
                         SwitchToGameTable();
-                        RendererWidget.Dispose();
 
                         return;
                     }
diff --git a/Ryujinx/Ui/RendererWidgetBase.cs b/Ryujinx/Ui/RendererWidgetBase.cs
index 7e25ba2d9..576d2d121 100644
--- a/Ryujinx/Ui/RendererWidgetBase.cs
+++ b/Ryujinx/Ui/RendererWidgetBase.cs
@@ -519,10 +519,14 @@ namespace Ryujinx.Ui
             _gpuCancellationTokenSource.Cancel();
 
             _isStopped = true;
-            _isActive = false;
+            
+            if (_isActive)
+            {
+                _isActive = false;
 
-            _exitEvent.WaitOne();
-            _exitEvent.Dispose();
+                _exitEvent.WaitOne();
+                _exitEvent.Dispose();
+            }
         }
 
         private void NVStutterWorkaround()
diff --git a/Ryujinx/Ui/VKRenderer.cs b/Ryujinx/Ui/VKRenderer.cs
index 49578d2af..7e02c689d 100644
--- a/Ryujinx/Ui/VKRenderer.cs
+++ b/Ryujinx/Ui/VKRenderer.cs
@@ -72,7 +72,8 @@ namespace Ryujinx.Ui
 
         protected override void Dispose(bool disposing)
         {
-            Device.DisposeGpu();
+            Device?.DisposeGpu();
+
             NpadManager.Dispose();
         }
     }