diff --git a/Bloxstrap/App.xaml.cs b/Bloxstrap/App.xaml.cs
index f6e7072..4118020 100644
--- a/Bloxstrap/App.xaml.cs
+++ b/Bloxstrap/App.xaml.cs
@@ -138,6 +138,21 @@ namespace Bloxstrap
 
             Paths.Initialize(BaseDirectory);
 
+            // disallow running as administrator except for uninstallation
+            if (Utilities.IsAdministrator && !LaunchSettings.IsUninstall)
+            {
+                Frontend.ShowMessageBox(Bloxstrap.Resources.Strings.Bootstrapper_RanInAdminMode, MessageBoxImage.Error);
+                Terminate(ErrorCode.ERROR_INVALID_FUNCTION);
+                return;
+            }
+
+            if (LaunchSettings.IsUninstall && IsFirstRun)
+            {
+                Frontend.ShowMessageBox(Bloxstrap.Resources.Strings.Bootstrapper_FirstRunUninstall, MessageBoxImage.Error);
+                Terminate(ErrorCode.ERROR_INVALID_FUNCTION);
+                return;
+            }
+
             // we shouldn't save settings on the first run until the first installation is finished,
             // just in case the user decides to cancel the install
             if (!IsFirstRun)
@@ -175,13 +190,8 @@ namespace Bloxstrap
                 }
                 else
                 {
-                    if (Process.GetProcessesByName(ProjectName).Length > 1 && !LaunchSettings.IsQuiet)
-                        Frontend.ShowMessageBox(
-                            Bloxstrap.Resources.Strings.Menu_AlreadyRunning, 
-                            MessageBoxImage.Information
-                        );
-
-                    Frontend.ShowMenu();
+                    bool showAlreadyRunningWarning = Process.GetProcessesByName(ProjectName).Length > 1 && !LaunchSettings.IsQuiet;
+                    Frontend.ShowMenu(showAlreadyRunningWarning);
                 }
 
                 StartupFinished();
diff --git a/Bloxstrap/Bloxstrap.csproj b/Bloxstrap/Bloxstrap.csproj
index aa1b921..4056f8a 100644
--- a/Bloxstrap/Bloxstrap.csproj
+++ b/Bloxstrap/Bloxstrap.csproj
@@ -40,7 +40,7 @@
   <ItemGroup>
     <PackageReference Include="CommunityToolkit.Mvvm" Version="8.2.2" />
     <PackageReference Include="DiscordRichPresence" Version="1.2.1.24" />
-    <PackageReference Include="Markdig" Version="0.35.0" />
+    <PackageReference Include="Markdig" Version="0.37.0" />
     <PackageReference Include="Microsoft.Windows.CsWin32" Version="0.3.18-beta">
       <!--<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>-->
       <PrivateAssets>all</PrivateAssets>
diff --git a/Bloxstrap/Bootstrapper.cs b/Bloxstrap/Bootstrapper.cs
index a0befdf..b63b34f 100644
--- a/Bloxstrap/Bootstrapper.cs
+++ b/Bloxstrap/Bootstrapper.cs
@@ -1202,7 +1202,7 @@ namespace Bloxstrap
             if (App.IsFirstRun && App.CustomFontLocation is not null)
             {
                 Directory.CreateDirectory(Path.GetDirectoryName(Paths.CustomFont)!);
-                File.Copy(App.CustomFontLocation, Paths.CustomFont);
+                File.Copy(App.CustomFontLocation, Paths.CustomFont, true);
             }
 
             if (File.Exists(Paths.CustomFont))
diff --git a/Bloxstrap/Enums/ErrorCode.cs b/Bloxstrap/Enums/ErrorCode.cs
index ba6b65e..f6b6609 100644
--- a/Bloxstrap/Enums/ErrorCode.cs
+++ b/Bloxstrap/Enums/ErrorCode.cs
@@ -8,6 +8,7 @@
     public enum ErrorCode
     {
         ERROR_SUCCESS = 0,
+        ERROR_INVALID_FUNCTION = 1,
         ERROR_INSTALL_USEREXIT = 1602,
         ERROR_INSTALL_FAILURE = 1603,
         ERROR_CANCELLED = 1223,
diff --git a/Bloxstrap/Resources/Strings.Designer.cs b/Bloxstrap/Resources/Strings.Designer.cs
index 4f01855..2a7a0da 100644
--- a/Bloxstrap/Resources/Strings.Designer.cs
+++ b/Bloxstrap/Resources/Strings.Designer.cs
@@ -133,6 +133,15 @@ namespace Bloxstrap.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to You must first install Bloxstrap before uninstalling..
+        /// </summary>
+        public static string Bootstrapper_FirstRunUninstall {
+            get {
+                return ResourceManager.GetString("Bootstrapper.FirstRunUninstall", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Roblox has now finished rolling out the new game client update, featuring 64-bit support and the Hyperion anticheat. ReShade does not work with this update, and so it has now been disabled and removed from Bloxstrap.
         ///
@@ -153,6 +162,15 @@ namespace Bloxstrap.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Bloxstrap does not support running in administrator mode. Relaunch or reinstall Bloxstrap with lower privileges..
+        /// </summary>
+        public static string Bootstrapper_RanInAdminMode {
+            get {
+                return ResourceManager.GetString("Bootstrapper.RanInAdminMode", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Applying Roblox modifications....
         /// </summary>
@@ -1462,11 +1480,20 @@ namespace Bloxstrap.Resources {
         }
         
         /// <summary>
-        ///   Looks up a localized string similar to Bloxstrap is currently running, likely as a background Roblox process. Please note that not all your changes will immediately apply until you close all currently open Roblox instances..
+        ///   Looks up a localized string similar to Please note that not all your changes will immediately apply until you close all currently open Roblox instances..
         /// </summary>
-        public static string Menu_AlreadyRunning {
+        public static string Menu_AlreadyRunning_Caption {
             get {
-                return ResourceManager.GetString("Menu.AlreadyRunning", resourceCulture);
+                return ResourceManager.GetString("Menu.AlreadyRunning.Caption", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Bloxstrap is already running.
+        /// </summary>
+        public static string Menu_AlreadyRunning_Title {
+            get {
+                return ResourceManager.GetString("Menu.AlreadyRunning.Title", resourceCulture);
             }
         }
         
diff --git a/Bloxstrap/Resources/Strings.resx b/Bloxstrap/Resources/Strings.resx
index afaea78..d24de5b 100644
--- a/Bloxstrap/Resources/Strings.resx
+++ b/Bloxstrap/Resources/Strings.resx
@@ -142,6 +142,9 @@ Would you like to switch to the default channel ({1})?</value>
   <data name="Bootstrapper.DeeplinkTempEnabled" xml:space="preserve">
     <value>Roblox was launched via a deeplink, however the desktop app is required for deeplink launching to work. Because you've opted to disable the desktop app, it will temporarily be re-enabled for this launch only.</value>
   </data>
+  <data name="Bootstrapper.FirstRunUninstall" xml:space="preserve">
+    <value>You must first install Bloxstrap before uninstalling.</value>
+  </data>
   <data name="Bootstrapper.HyperionUpdateInfo" xml:space="preserve">
     <value>Roblox has now finished rolling out the new game client update, featuring 64-bit support and the Hyperion anticheat. ReShade does not work with this update, and so it has now been disabled and removed from Bloxstrap.
 
@@ -150,6 +153,9 @@ Your ReShade configuration files will still be saved, and you can locate them by
   <data name="Bootstrapper.NotEnoughSpace" xml:space="preserve">
     <value>Bloxstrap does not have enough disk space to download and install Roblox. Please free up some disk space and try again.</value>
   </data>
+  <data name="Bootstrapper.RanInAdminMode" xml:space="preserve">
+    <value>Bloxstrap does not support running in administrator mode. Relaunch or reinstall Bloxstrap with lower privileges.</value>
+  </data>
   <data name="Bootstrapper.Status.ApplyingModifications" xml:space="preserve">
     <value>Applying Roblox modifications...</value>
   </data>
@@ -590,8 +596,11 @@ Would you like to upgrade your currently installed version?</value>
   <data name="Menu.AllFiles" xml:space="preserve">
     <value>All files</value>
   </data>
-  <data name="Menu.AlreadyRunning" xml:space="preserve">
-    <value>Bloxstrap is currently running, likely as a background Roblox process. Please note that not all your changes will immediately apply until you close all currently open Roblox instances.</value>
+  <data name="Menu.AlreadyRunning.Caption" xml:space="preserve">
+    <value>Please note that not all your changes will immediately apply until you close all currently open Roblox instances.</value>
+  </data>
+  <data name="Menu.AlreadyRunning.Title" xml:space="preserve">
+    <value>Bloxstrap is already running</value>
   </data>
   <data name="Menu.Appearance.Bootstrapper.Description" xml:space="preserve">
     <value>You can make it look different, retro, or even just like Roblox.</value>
diff --git a/Bloxstrap/UI/Elements/Menu/MainWindow.xaml b/Bloxstrap/UI/Elements/Menu/MainWindow.xaml
index ad73178..86a1ce1 100644
--- a/Bloxstrap/UI/Elements/Menu/MainWindow.xaml
+++ b/Bloxstrap/UI/Elements/Menu/MainWindow.xaml
@@ -1,4 +1,4 @@
-<base:WpfUiWindow x:Class="Bloxstrap.UI.Elements.Menu.MainWindow"
+<base:WpfUiWindow x:Class="Bloxstrap.UI.Elements.Menu.MainWindow"
              x:Name="ConfigurationWindow"
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
@@ -24,6 +24,12 @@
             <RowDefinition Height="Auto" />
         </Grid.RowDefinitions>
 
+        <ui:Snackbar
+            x:Name="AlreadyRunningSnackbar"
+            Title="{x:Static resources:Strings.Menu_AlreadyRunning_Title}"
+            Message="{x:Static resources:Strings.Menu_AlreadyRunning_Caption}"
+            Icon="Info20" Timeout="10000" Margin="200,0,200,20" Grid.RowSpan="10" Panel.ZIndex="10" />
+
         <ui:TitleBar Padding="8" x:Name="RootTitleBar" Grid.Row="0" ForceShutdown="False" MinimizeToTray="False" ShowHelp="True" HelpClicked="OpenWiki" UseSnapLayout="True" Title="{x:Static resources:Strings.Menu_Title}" Icon="pack://application:,,,/Bloxstrap.ico" />
 
         <Grid x:Name="RootGrid" Grid.Row="1" Margin="12,12,0,0" Visibility="Visible">
diff --git a/Bloxstrap/UI/Elements/Menu/MainWindow.xaml.cs b/Bloxstrap/UI/Elements/Menu/MainWindow.xaml.cs
index dfa4e1f..4f317fc 100644
--- a/Bloxstrap/UI/Elements/Menu/MainWindow.xaml.cs
+++ b/Bloxstrap/UI/Elements/Menu/MainWindow.xaml.cs
@@ -10,7 +10,7 @@ namespace Bloxstrap.UI.Elements.Menu
     /// </summary>
     public partial class MainWindow : INavigationWindow
     {
-        public MainWindow()
+        public MainWindow(bool showAlreadyRunningWarning)
         {
             InitializeComponent();
             ApplyTheme();
@@ -22,6 +22,15 @@ namespace Bloxstrap.UI.Elements.Menu
 #if DEBUG // easier access
             PreInstallNavItem.Visibility = System.Windows.Visibility.Visible;
 #endif
+
+            if (showAlreadyRunningWarning)
+                _ = ShowAlreadyRunningSnackbar();
+        }
+
+        private async Task ShowAlreadyRunningSnackbar()
+        {
+            await Task.Delay(500); // wait for everything to finish loading
+            AlreadyRunningSnackbar.Show();
         }
 
         public void OpenWiki(object? sender, EventArgs e) => Utilities.ShellExecute($"https://github.com/{App.ProjectRepository}/wiki");
diff --git a/Bloxstrap/UI/Frontend.cs b/Bloxstrap/UI/Frontend.cs
index 1561f7f..c4ddeef 100644
--- a/Bloxstrap/UI/Frontend.cs
+++ b/Bloxstrap/UI/Frontend.cs
@@ -8,7 +8,7 @@ namespace Bloxstrap.UI
 {
     static class Frontend
     {
-        public static void ShowMenu() => new MainWindow().ShowDialog();
+        public static void ShowMenu(bool showAlreadyRunningWarning = false) => new MainWindow(showAlreadyRunningWarning).ShowDialog();
 
         public static MessageBoxResult ShowMessageBox(string message, MessageBoxImage icon = MessageBoxImage.None, MessageBoxButton buttons = MessageBoxButton.OK, MessageBoxResult defaultResult = MessageBoxResult.None)
         {
diff --git a/Bloxstrap/Utilities.cs b/Bloxstrap/Utilities.cs
index 7f33a19..eaf3816 100644
--- a/Bloxstrap/Utilities.cs
+++ b/Bloxstrap/Utilities.cs
@@ -1,9 +1,18 @@
 using System.ComponentModel;
+using System.Security.Principal;
 
 namespace Bloxstrap
 {
     static class Utilities
     {
+        /// <summary>
+        /// Is process running as administrator
+        /// https://stackoverflow.com/a/11660205
+        /// </summary>
+        public static bool IsAdministrator =>
+           new WindowsPrincipal(WindowsIdentity.GetCurrent())
+               .IsInRole(WindowsBuiltInRole.Administrator);
+
         public static void ShellExecute(string website)
         {
             try