diff --git a/src/TeamsISO.App.WinUI/TeamsISO.App.WinUI.csproj b/src/TeamsISO.App.WinUI/TeamsISO.App.WinUI.csproj
index e4c05f5..f7e4aed 100644
--- a/src/TeamsISO.App.WinUI/TeamsISO.App.WinUI.csproj
+++ b/src/TeamsISO.App.WinUI/TeamsISO.App.WinUI.csproj
@@ -63,6 +63,19 @@
       loader doesn't find them at activation time.
     -->
     <RuntimeIdentifier>win-x64</RuntimeIdentifier>
+    <!--
+      Suppress the auto-injected UndockedRegFreeWinRT ModuleInitializer.
+      The bundled initializer P/Invokes Microsoft.WindowsAppRuntime.dll
+      during module load, BEFORE our Program.Main has a chance to call
+      Bootstrap.TryInitialize. Since the runtime DLL lives in the framework
+      MSIX package (not the output dir) on a framework-dependent install,
+      the P/Invoke fails to locate it and the .exe dies with the generic
+      "this application could not be started" dialog — diagnosed by
+      following the Microsoft.WindowsAppSDK.UndockedRegFreeWinRT.CS.targets
+      chain and reading the auto-init source. Our Program.cs handles the
+      bootstrap explicitly in the right order.
+    -->
+    <WindowsAppSdkUndockedRegFreeWinRTInitialize>false</WindowsAppSdkUndockedRegFreeWinRTInitialize>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <ApplicationIcon>Assets\teamsiso.ico</ApplicationIcon>