diff --git a/.github/workflows/build-all.yml b/.github/workflows/build-all.yml
index 15b0763..67f6ae7 100644
--- a/.github/workflows/build-all.yml
+++ b/.github/workflows/build-all.yml
@@ -31,6 +31,9 @@ jobs:
           - flavor: win-x64
             os: windows-latest
             script: build_win-x64.bat
+          - flavor: win-arm64
+            os: windows-latest
+            script: build_win-arm64.bat
     steps:
       - name: Checkout
         uses: actions/checkout@v6
diff --git a/build_win-arm64.bat b/build_win-arm64.bat
new file mode 100644
index 0000000..7f6eb9d
--- /dev/null
+++ b/build_win-arm64.bat
@@ -0,0 +1,19 @@
+@echo off
+setlocal enabledelayedexpansion
+
+if "%~1"=="" (
+    echo Version number is required.
+    echo Usage: build.bat [version] [extra_args...]
+    exit /b 1
+)
+
+set "version=%~1"
+
+echo.
+echo Compiling Launcher with dotnet...
+echo %~dp0publish
+dotnet publish .\src\Launcher.slnx -c Release --no-self-contained -r win-arm64 --property:PublishDir="%~dp0publish"
+
+echo.
+echo Building Velopack Release v%version%
+vpk pack --packTitle "OSFR Launcher" --packAuthors "OSFR Team" -u OSFRLauncher -e Launcher.exe -o "%~dp0releases" -p "%~dp0publish" -i "%~dp0publish\App.ico" -f net10-arm64-desktop -v %*
\ No newline at end of file
diff --git a/src/Launcher/Helpers/Dx9Helper.cs b/src/Launcher/Helpers/Dx9Helper.cs
index d70454a..645b41c 100644
--- a/src/Launcher/Helpers/Dx9Helper.cs
+++ b/src/Launcher/Helpers/Dx9Helper.cs
@@ -12,35 +12,28 @@ public static bool IsInstalled()
     {
         try
         {
-            string? systemPath = null;
-
-            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ||
+                RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
             {
-                string winDir = Environment.GetFolderPath(Environment.SpecialFolder.Windows);
-                systemPath = Path.Combine(winDir, "System32");
+                // Wine uses wined3d which it ships with, not native DirectX DLLs
+                return WineHelper.IsInstalled();
             }
-            else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ||
-                     RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
-            {
-                if (string.IsNullOrEmpty(WineHelper.GetPath()))
-                    return false;
-
-                var winePrefix = Environment.GetEnvironmentVariable("WINEPREFIX") ??
-                                 Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".wine");
 
-                systemPath = Path.Combine(winePrefix, "drive_c", "windows", "system32");
-            }
-            else
+            if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
             {
+                // Unknown platform
                 return false;
             }
 
-            if (!Directory.Exists(systemPath))
-                return false;
+            string winDir = Environment.GetFolderPath(Environment.SpecialFolder.Windows);
+
+            // The game client is 32-bit, so its DLLs are loaded from SysWOW64 on 64-bit Windows.
+            // Since the launcher is 64-bit only, this is the dir we need to check; not System32
+            string sysWow64Path = Path.Combine(winDir, "SysWOW64");
 
             foreach (var requiredDll in RequiredDlls)
             {
-                if (!File.Exists(Path.Combine(systemPath, requiredDll)))
+                if (!File.Exists(Path.Combine(sysWow64Path, requiredDll)))
                     return false;
             }
         }
diff --git a/src/Launcher/Helpers/WineHelper.cs b/src/Launcher/Helpers/WineHelper.cs
index 708a46a..bef10c0 100644
--- a/src/Launcher/Helpers/WineHelper.cs
+++ b/src/Launcher/Helpers/WineHelper.cs
@@ -36,4 +36,9 @@ public static string GetPath()
 
         return string.Empty;
     }
+
+    public static bool IsInstalled()
+    {
+        return !string.IsNullOrEmpty(GetPath());
+    }
 }
\ No newline at end of file