diff --git a/.github/workflows/build-and-make.yaml b/.github/workflows/build-and-make.yaml
index e5914bbe5..bd0abee32 100644
--- a/.github/workflows/build-and-make.yaml
+++ b/.github/workflows/build-and-make.yaml
@@ -323,6 +323,12 @@ jobs:
                       ;;
                     win32)
                       test -f dist/apps/electron-backend/native/lib/mpv-2.dll || test -f dist/apps/electron-backend/native/lib/libmpv-2.dll || test -f dist/apps/electron-backend/native/lib/mpv.dll || test -f dist/apps/electron-backend/native/lib/libmpv.dll
+                      # Frame-copy engine artifacts ship on Windows. The helper
+                      # resolves the mpv DLL from its own directory, so the DLL
+                      # must sit beside it at the native/ top level too.
+                      test -f dist/apps/electron-backend/native/iptvnator_mpv_helper.exe
+                      test -f dist/apps/electron-backend/native/embedded_mpv_frame_reader.node
+                      find dist/apps/electron-backend/native -maxdepth 1 \( -name 'mpv-2.dll' -o -name 'libmpv-2.dll' -o -name 'mpv.dll' -o -name 'libmpv.dll' \) -print -quit | grep -q .
                       ;;
                     linux)
                       node -e "const manifest = require('./dist/apps/electron-backend/native/embedded-mpv-runtime.json'); if (manifest.origin !== 'external-mpv-process') { throw new Error('Linux embedded MPV manifest must use external-mpv-process origin.'); }"
diff --git a/apps/electron-backend/project.json b/apps/electron-backend/project.json
index ec1cff48d..fc23eea78 100644
--- a/apps/electron-backend/project.json
+++ b/apps/electron-backend/project.json
@@ -52,7 +52,16 @@
                             ".deps/**",
                             "obj.target/**",
                             "**/.deps/**",
-                            "**/obj.target/**"
+                            "**/obj.target/**",
+                            "obj/**",
+                            "**/obj/**",
+                            "**/*.pdb",
+                            "**/*.iobj",
+                            "**/*.ipdb",
+                            "**/*.ilk",
+                            "**/*.exp",
+                            "**/*.lib",
+                            "**/*.dll.a"
                         ]
                     }
                 ]
@@ -105,7 +114,16 @@
                             ".deps/**",
                             "obj.target/**",
                             "**/.deps/**",
-                            "**/obj.target/**"
+                            "**/obj.target/**",
+                            "obj/**",
+                            "**/obj/**",
+                            "**/*.pdb",
+                            "**/*.iobj",
+                            "**/*.ipdb",
+                            "**/*.ilk",
+                            "**/*.exp",
+                            "**/*.lib",
+                            "**/*.dll.a"
                         ]
                     }
                 ]
diff --git a/tools/packaging/electron-package-identity.test.mjs b/tools/packaging/electron-package-identity.test.mjs
index bbfaf132e..809ff4231 100644
--- a/tools/packaging/electron-package-identity.test.mjs
+++ b/tools/packaging/electron-package-identity.test.mjs
@@ -119,8 +119,10 @@ test('Linux package identity does not expose the internal Electron backend proje
 });
 
 test('GitHub Releases auto-update metadata is generated and uploaded', () => {
+    // \r?\n keeps this host-agnostic: Windows checkouts with autocrlf see
+    // CRLF in the workflow file.
     const releaseFiles = buildAndMakeWorkflow.match(
-        /files: \|\n([\s\S]*?)\n\s+env:/
+        /files: \|\r?\n([\s\S]*?)\r?\n\s+env:/
     )?.[1];
 
     assert.ok(releaseFiles, 'release upload files block must exist');
@@ -307,7 +309,13 @@ test('embedded MPV package validation accepts Windows runtime files and Linux pr
             ['windows', join('lib', 'mpv.dll')],
             ['windows', join('lib', 'libmpv.dll')],
         ]) {
-            const resourceDir = join(tempDir, platform);
+            // One fixture dir per runtime-file scenario: the frame-copy
+            // artifacts written below must not leak into the next
+            // iteration's missing-artifact assertions.
+            const resourceDir = join(
+                tempDir,
+                `${platform}-${runtimeFile.replace(/[\\/]/g, '_')}`
+            );
             const nativeDir = join(
                 resourceDir,
                 'app.asar.unpacked',
@@ -322,6 +330,29 @@ test('embedded MPV package validation accepts Windows runtime files and Linux pr
             );
             fs.writeFileSync(join(nativeDir, runtimeFile), '');
 
+            // Windows packages that ship the addon must also ship the
+            // frame-copy engine artifacts built by the same binding.gyp run.
+            const missingWindowsFrameCopyErrors = validatePackagedEmbeddedMpv(
+                resourceDir,
+                { platform, required: true }
+            );
+            assert.ok(
+                missingWindowsFrameCopyErrors.some((error) =>
+                    error.includes('iptvnator_mpv_helper.exe')
+                )
+            );
+            assert.ok(
+                missingWindowsFrameCopyErrors.some((error) =>
+                    error.includes('embedded_mpv_frame_reader.node')
+                )
+            );
+
+            fs.writeFileSync(join(nativeDir, 'iptvnator_mpv_helper.exe'), '');
+            fs.writeFileSync(
+                join(nativeDir, 'embedded_mpv_frame_reader.node'),
+                ''
+            );
+
             assert.deepEqual(
                 validatePackagedEmbeddedMpv(resourceDir, {
                     platform,
diff --git a/tools/packaging/embedded-mpv-packaging.cjs b/tools/packaging/embedded-mpv-packaging.cjs
index 3516e2950..afb376c8e 100644
--- a/tools/packaging/embedded-mpv-packaging.cjs
+++ b/tools/packaging/embedded-mpv-packaging.cjs
@@ -540,12 +540,16 @@ function validatePackagedEmbeddedMpv(resourceDir, options = {}) {
         return errors;
     }
 
-    if (platform === 'darwin') {
+    if (platform === 'darwin' || platform === 'win32') {
         // The frame-copy engine artifacts are built by the same binding.gyp
-        // run as the addon; a macOS package that ships the addon without
-        // them would silently lose the engine (support probe hides it).
+        // run as the addon; a macOS/Windows package that ships the addon
+        // without them would silently lose the engine (support probe hides
+        // it). Linux packages intentionally strip the helper until the
+        // bundled-libmpv runtime lands (see electron-after-pack.cjs).
         const missingFrameCopyArtifacts = [
-            'iptvnator_mpv_helper',
+            platform === 'win32'
+                ? 'iptvnator_mpv_helper.exe'
+                : 'iptvnator_mpv_helper',
             'embedded_mpv_frame_reader.node',
         ]
             .map((name) => path.join(unpackedNativeDir, name))