diff --git a/docs/steam.md b/docs/steam.md
index 7a0d859..846e1d1 100644
--- a/docs/steam.md
+++ b/docs/steam.md
@@ -105,9 +105,9 @@ await window.next2dWindow.quit();
 const off = window.next2dWindow.onResume(() => { /* 状態の再送など */ });
 ```
 
-重ね表示が有効なときは、アプリは**1つだけ**起動します（2つ目の起動はすぐに終了します。macOSではDockにアイコンも出しません）。開発中に複数起動したいときは `--next2d-allow-multiple` を付けて起動します。
+重ね表示が有効なときは、アプリは**1つだけ**起動します（2つ目の起動はすぐに終了します）。macOSではDockにアイコンを出しません（エージェントアプリ。終了はゲーム内のボタンで行います）。開発中に複数起動したいときは `--next2d-allow-multiple` を付けて起動します。
 
-スリープ（ノートPCのふたを閉じる等）から復帰すると、GPUがリセットされて描画が止まることがあるため、画面（renderer）を読み込み直します（ゲームは自動保存を前提にしてください）。電源・ディスプレイ・GPUのイベントは `userData/diagnostics.log`（Windowsは `%APPDATA%\<appId>\diagnostics.log`）に記録されます。
+Windowsでスリープ（ノートPCのふたを閉じる等）から復帰すると、重ね表示の窓がマウスを受け取れなくなることがあるため、窓を作り直します（ゲームは自動保存を前提にしてください）。電源・ディスプレイ・GPUのイベントは `userData/diagnostics.log`（Windowsは `%APPDATA%\<appId>\diagnostics.log`）に記録されます。
 
 Linuxの透明表示はコンポジタが必要です。
 
@@ -327,9 +327,9 @@ await window.next2dWindow.quit();
 const off = window.next2dWindow.onResume(() => { /* resend state, etc. */ });
 ```
 
-With the overlay enabled the app runs **once**: a second launch quits at once (and, on macOS, never shows a Dock icon). Start with `--next2d-allow-multiple` to run several copies while developing.
+With the overlay enabled the app runs **once**: a second launch quits at once. On macOS it is an agent app with no Dock icon (quit from inside the game). Start with `--next2d-allow-multiple` to run several copies while developing.
 
-After sleep (e.g. closing a laptop lid) the GPU may be reset and drawing stops, so the page (renderer) is loaded again; the game should save automatically. Power, display and GPU events are logged to `userData/diagnostics.log` (Windows: `%APPDATA%\<appId>\diagnostics.log`).
+On Windows, after sleep (e.g. closing a laptop lid) the overlay window can stop receiving the mouse, so a fresh window replaces it; the game should save automatically. Power, display and GPU events are logged to `userData/diagnostics.log` (Windows: `%APPDATA%\<appId>\diagnostics.log`).
 
 Transparency on Linux requires a compositor.
 
diff --git a/package-lock.json b/package-lock.json
index 65ff957..ff1e948 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@next2d/builder",
-  "version": "0.4.6",
+  "version": "0.4.7",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@next2d/builder",
-      "version": "0.4.6",
+      "version": "0.4.7",
       "license": "MIT",
       "bin": {
         "builder": "dist/index.js"
diff --git a/package.json b/package.json
index 22cbced..193b236 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@next2d/builder",
-  "version": "0.4.6",
+  "version": "0.4.7",
   "description": "Multi-platform builder for Next2d Framework, supporting export to various platforms such as macOS, Windows, iOS, Android and Web(HTML)",
   "author": "Toshiyuki Ienaga <ienaga@next2d.app>",
   "license": "MIT",
diff --git a/src/electron-config.ts b/src/electron-config.ts
index 595692a..5093c85 100644
--- a/src/electron-config.ts
+++ b/src/electron-config.ts
@@ -154,8 +154,7 @@ export const createElectronPackagerOptions = (
         ...os === "macos" && (config.macos.localNetworkUsageDescription || config.window.overlay?.enabled) ? {
             "extendInfo": {
                 ...config.macos.localNetworkUsageDescription ? { "NSLocalNetworkUsageDescription": config.macos.localNetworkUsageDescription } : {},
-                // An overlay starts as an agent app (no Dock icon) so that a second launch, which quits at once,
-                // never shows one. The first instance shows its Dock icon itself (templates/electron/index.js).
+                // An overlay is an agent app: no Dock icon, also for a second launch that quits at once.
                 ...config.window.overlay?.enabled ? { "LSUIElement": true } : {}
             },
             ...config.macos.localNetworkUsageDescription ? {
diff --git a/templates/electron/index.js b/templates/electron/index.js
index 7a03389..1f67b45 100644
--- a/templates/electron/index.js
+++ b/templates/electron/index.js
@@ -76,9 +76,6 @@ const diag = (message) => {
         fs.appendFileSync(file, `${new Date().toISOString()} ${message}\n`);
     } catch { /* diagnostics must never break the game */ }
 };
-// After sleep (closing a laptop lid) the GPU is often reset. The renderer then keeps showing its last frame but can
-// no longer draw (the web page is not told), so the pet looks alive and menus never appear. Load the page again to
-// get a fresh GPU device. The game saves automatically, so progress is kept.
 // Counts of mouse events the page really receives (moves are forwarded while click-through; down/up only arrive
 // while the window accepts clicks). Logged when they change, to tell "clicks never reach the page" from other causes.
 const DIAG_SCRIPT = `(() => {
@@ -103,12 +100,29 @@ const snapshotRenderer = async () => {
         diag(`renderer snapshot failed: ${error?.message ?? error}`);
     }
 };
-const reloadRenderer = () => {
-    if (!mainWindow || mainWindow.isDestroyed()) return;
-    diag("reload renderer (resume)");
+// After sleep (closing a laptop lid) Windows can leave the overlay window itself broken: mouse moves are no longer
+// forwarded to it, or clicks fall through even where the pet is drawn. Reloading the page does not help (the
+// window is the same), so build a new window and close the old one. The game saves automatically, so progress is
+// kept. The new window is created first so the app never has zero windows (which would quit it).
+let recreating = false;
+const recreateWindow = async () => {
+    if (recreating || !mainWindow || mainWindow.isDestroyed()) return;
+    recreating = true;
+    diag("recreate window (resume)");
+    const old = mainWindow;
     overlayIgnore = Boolean(overlay?.clickThrough);
-    mainWindow.setIgnoreMouseEvents(overlayIgnore, overlayIgnore ? { forward: true } : undefined);
-    mainWindow.webContents.reloadIgnoringCache();
+    try {
+        await createWindow();
+    } catch (error) {
+        diag(`recreate window failed: ${error?.message ?? error}`);
+    } finally {
+        recreating = false;
+        if (old !== mainWindow && !old.isDestroyed()) {
+            // Closing on purpose: do not treat the old page going away as a crash.
+            old.webContents.removeAllListeners("render-process-gone");
+            old.destroy();
+        }
+    }
 };
 const createWindow = async () => {
     const { width, height } = screen.getPrimaryDisplay().workAreaSize;
@@ -205,9 +219,8 @@ const createWindow = async () => {
 
 app.whenReady().then(async () => {
     if (!hasLock) return;
-    // The overlay app is packaged as an agent app (LSUIElement) so a second launch never shows a Dock icon;
-    // the instance that keeps running shows it.
-    if (process.platform === "darwin" && overlay) app.dock?.show();
+    // The overlay app is packaged as an agent app (LSUIElement): it never shows a Dock icon (a desktop pet stays out
+    // of the Dock and the app switcher; the game offers its own "quit").
     Menu.setApplicationMenu(process.platform === "darwin" ? Menu.buildFromTemplate([
         { role: "appMenu" }, { role: "editMenu" }, { role: "windowMenu" }
     ]) : null);
@@ -278,11 +291,12 @@ app.whenReady().then(async () => {
         for (const name of ["resume", "unlock-screen"]) {
             powerMonitor.on(name, () => {
                 diag(name);
-                setTimeout(() => {
-                    recoverOverlay();
-                    // Only a resume from sleep can reset the GPU (unlocking the screen cannot).
-                    if (name === "resume") reloadRenderer();
-                }, 1000);
+                if (name === "resume" && process.platform === "win32") {
+                    // Give the GPU/display time to come back, then start over with a fresh window.
+                    setTimeout(() => { void recreateWindow(); }, 3000);
+                } else {
+                    setTimeout(recoverOverlay, 1000);
+                }
             });
         }
         app.on("child-process-gone", (_event, details) => diag(`child-process-gone ${details.type} ${details.reason}`));
diff --git a/tests/electron-overlay.test.ts b/tests/electron-overlay.test.ts
index 3f3c75a..2a50557 100644
--- a/tests/electron-overlay.test.ts
+++ b/tests/electron-overlay.test.ts
@@ -41,7 +41,7 @@ const fakeElectron = (options = {}) => {
         constructor(options) {
             this.options = options;
             this.bounds = { x: options.x ?? 0, y: options.y ?? 0, width: options.width, height: options.height };
-            this.webContents = { executeJavaScript: async (script) => { calls.push(["executeJavaScript", script.slice(0, 20)]); return "{\"moves\":1}"; }, reloadIgnoringCache: () => calls.push(["reloadIgnoringCache"]), setWindowOpenHandler() {}, on: (name, cb) => calls.push(["webContents.on", name, cb]), send: (...args) => calls.push(["send", ...args]), mainFrame: {} };
+            this.webContents = { executeJavaScript: async (script) => { calls.push(["executeJavaScript", script.slice(0, 20)]); return "{\"moves\":1}"; }, reloadIgnoringCache: () => calls.push(["reloadIgnoringCache"]), setWindowOpenHandler() {}, on: (name, cb) => calls.push(["webContents.on", name, cb]), removeAllListeners: (name) => calls.push(["webContents.removeAllListeners", name]), send: (...args) => calls.push(["send", ...args]), mainFrame: {} };
             windows.push(this);
         }
         setAlwaysOnTop(...args) { calls.push(["setAlwaysOnTop", ...args]); }
@@ -51,7 +51,8 @@ const fakeElectron = (options = {}) => {
         getBounds() { return this.bounds; }
         setFullScreen(value) { calls.push(["setFullScreen", value]); }
         isFullScreen() { return false; }
-        isDestroyed() { return false; }
+        isDestroyed() { return Boolean(this.destroyed); }
+        destroy() { this.destroyed = true; calls.push(["destroy"]); this.onceListeners?.closed?.(); }
         isVisible() { return true; }
         isAlwaysOnTop() { return true; }
         moveTop() { calls.push(["moveTop"]); }
@@ -236,8 +237,8 @@ test("a desktop overlay runs once: a second launch quits before any window or Do
     const first = await startHost(t, { window: { overlay: { enabled: true, clickThrough: true } } });
     assert.equal(first.windows.length, 1);
     assert.equal(first.calls.some(([name]) => name === "exit"), false);
-    // The running instance shows its Dock icon itself (the app is packaged as an agent app).
-    assert.equal(first.calls.some(([name]) => name === "dock.show"), process.platform === "darwin");
+    // The overlay is an agent app: no instance shows a Dock icon.
+    assert.equal(first.calls.some(([name]) => name === "dock.show"), false);
     assert.equal(denied.calls.some(([name]) => name === "dock.show"), false);
     first.calls.length = 0;
     first.appListeners.get("second-instance")();
@@ -280,25 +281,48 @@ test("on other platforms there is no periodic raise", async (t) => {
     assert.equal(calls.some(([name]) => name === "moveTop"), false);
 });
 
-test("after sleep the renderer is loaded again (the GPU may have been reset); unlocking the screen does not", async (t) => {
-    t.mock.timers.enable({ apis: ["setTimeout"] });
+test("on Windows a fresh window replaces the old one after sleep; unlocking the screen only re-applies the overlay", async (t) => {
+    t.mock.timers.enable({ apis: ["setInterval", "setTimeout"] });
+    const platform = Object.getOwnPropertyDescriptor(process, "platform");
+    Object.defineProperty(process, "platform", { value: "win32" });
+    t.after(() => Object.defineProperty(process, "platform", platform));
     const diagnostics = path.join(os.tmpdir(), "diagnostics.log");
     fs.rmSync(diagnostics, { force: true });
     t.after(() => fs.rmSync(diagnostics, { force: true }));
-    const { powerListeners, calls } = await startHost(t, { window: { overlay: { enabled: true, clickThrough: true } } });
+    const { powerListeners, calls, windows } = await startHost(t, { window: { overlay: { enabled: true, clickThrough: true } } });
     assert.deepEqual([...powerListeners.keys()].sort(), ["lock-screen", "resume", "suspend", "unlock-screen"]);
     calls.length = 0;
     powerListeners.get("unlock-screen")();
     t.mock.timers.tick(1000);
-    assert.equal(calls.some(([name]) => name === "reloadIgnoringCache"), false);
+    assert.equal(windows.length, 1);
+    assert.ok(calls.some(([name]) => name === "send"));
     powerListeners.get("suspend")();
     powerListeners.get("resume")();
-    t.mock.timers.tick(1000);
-    assert.equal(calls.filter(([name]) => name === "reloadIgnoringCache").length, 1);
-    // Click-through starts again from the configured state after the page was reloaded.
-    assert.deepEqual(calls.filter(([name]) => name === "setIgnoreMouseEvents").at(-1), ["setIgnoreMouseEvents", true, { forward: true }]);
+    t.mock.timers.tick(3000);
+    await new Promise((resolve) => setImmediate(resolve));
+    await new Promise((resolve) => setImmediate(resolve));
+    // A new window exists and the old one was closed without being treated as a crash.
+    assert.equal(windows.length, 2);
+    assert.equal(windows[0].destroyed, true);
+    assert.equal(Boolean(windows[1].destroyed), false);
+    assert.ok(calls.some(([name, event]) => name === "webContents.removeAllListeners" && event === "render-process-gone"));
+    assert.equal(calls.some(([name]) => name === "reloadIgnoringCache"), false);
+    // The new window starts click-through, like a fresh launch.
+    assert.deepEqual(windows[1].options.focusable, false);
     const log = fs.readFileSync(diagnostics, "utf8");
-    for (const word of ["unlock-screen", "suspend", "resume", "reload renderer (resume)"]) assert.match(log, new RegExp(word.replace(/[()]/g, "\\$&")));
+    for (const word of ["unlock-screen", "suspend", "resume", "recreate window \\(resume\\)"]) assert.match(log, new RegExp(word));
+});
+
+test("on other platforms a resume only re-applies the overlay (no new window, no reload)", async (t) => {
+    t.mock.timers.enable({ apis: ["setTimeout"] });
+    if (process.platform === "win32") return;
+    const { powerListeners, calls, windows } = await startHost(t, { window: { overlay: { enabled: true, clickThrough: true } } });
+    calls.length = 0;
+    powerListeners.get("resume")();
+    t.mock.timers.tick(3000);
+    assert.equal(windows.length, 1);
+    assert.equal(calls.some(([name]) => name === "reloadIgnoringCache" || name === "destroy"), false);
+    assert.ok(calls.some(([name, event]) => name === "send" && event === "next2d:window:resume"));
 });
 
 test("the page's mouse event counts are written to the diagnostics log when they change", async (t) => {
diff --git a/tests/electron.test.ts b/tests/electron.test.ts
index 0aa2c75..f1d2368 100644
--- a/tests/electron.test.ts
+++ b/tests/electron.test.ts
@@ -62,7 +62,7 @@ test("macOS local network purpose is opt-in and applied to the app and helpers",
     assert.equal(createElectronPackagerOptions(root, config, "linux", root).extendHelperInfo, undefined);
     fs.writeFileSync(path.join(root, "electron.config.json"), "{}");
     assert.equal(createElectronPackagerOptions(root, readElectronConfig(root), "macos", root).extendInfo, undefined);
-    // An overlay is packaged as an agent app (no Dock icon until the running instance shows it).
+    // An overlay is packaged as an agent app (never a Dock icon).
     fs.writeFileSync(path.join(root, "electron.config.json"), JSON.stringify({ window: { overlay: { enabled: true } } }));
     const overlay = createElectronPackagerOptions(root, readElectronConfig(root), "macos", root);
     assert.deepEqual(overlay.extendInfo, { LSUIElement: true });