diff --git a/electron/main.ts b/electron/main.ts
index 89d05051..1cfa1c07 100644
--- a/electron/main.ts
+++ b/electron/main.ts
@@ -8,8 +8,8 @@ import {
 	dialog,
 	ipcMain,
 	Menu,
-	nativeImage,
 	Notification,
+	nativeImage,
 	session,
 	systemPreferences,
 	Tray,
@@ -22,27 +22,28 @@ import {
 	killWindowsCaptureProcess,
 	registerIpcHandlers,
 } from "./ipc/handlers";
+import type { UpdateToastPayload } from "./updater";
 import {
 	checkForAppUpdates,
+	deferUpdateReminder,
 	dismissUpdateToast,
 	downloadAvailableUpdate,
-	deferUpdateReminder,
 	getCurrentUpdateToastPayload,
 	getUpdaterLogPath,
 	getUpdateStatusSummary,
 	installDownloadedUpdateNow,
 	previewUpdateToast,
-	skipAvailableUpdateVersion,
 	setupAutoUpdates,
+	skipAvailableUpdateVersion,
 } from "./updater";
-import type { UpdateToastPayload } from "./updater";
 import {
 	createEditorWindow,
 	createHudOverlayWindow,
 	createSourceSelectorWindow,
-	getUpdateToastWindow,
 	getHudOverlayWindow,
+	getUpdateToastWindow,
 	hideUpdateToastWindow,
+	isHudOverlayMousePassthroughSupported,
 	showUpdateToastWindow,
 } from "./windows";
 
@@ -76,14 +77,8 @@ async function logSmokeExportGpuDiagnostics() {
 	}
 
 	try {
-		console.log(
-			"[smoke-export] GPU feature status",
-			JSON.stringify(app.getGPUFeatureStatus()),
-		);
-		console.log(
-			"[smoke-export] GPU info",
-			JSON.stringify(await app.getGPUInfo("basic")),
-		);
+		console.log("[smoke-export] GPU feature status", JSON.stringify(app.getGPUFeatureStatus()));
+		console.log("[smoke-export] GPU info", JSON.stringify(await app.getGPUInfo("basic")));
 	} catch (error) {
 		console.warn("[smoke-export] Failed to read GPU diagnostics:", error);
 	}
@@ -207,11 +202,17 @@ function focusOrCreateMainWindow() {
 			return;
 		}
 
-		// On Win32, calling show/moveTop/focus on the transparent HUD overlay
-		// permanently corrupts setIgnoreMouseEvents forwarding, making it
-		// click-through.  Only focus the editor window; the HUD is alwaysOnTop
-		// so it doesn't need explicit focus.
-		if (process.platform === "win32" && !isEditorWindow(mainWindow)) {
+		// On Win32 with mouse passthrough enabled (Win11+), calling
+		// show/moveTop/focus on the transparent HUD overlay permanently corrupts
+		// setIgnoreMouseEvents forwarding, making it click-through.  Only focus
+		// the editor window; the HUD is alwaysOnTop so it doesn't need explicit
+		// focus.  On Win10 (passthrough disabled), the HUD is always interactive
+		// and can be safely shown/restored.
+		if (
+			process.platform === "win32" &&
+			!isEditorWindow(mainWindow) &&
+			isHudOverlayMousePassthroughSupported()
+		) {
 			return;
 		}
 
@@ -229,7 +230,7 @@ function focusOrCreateMainWindow() {
  * operation that may alter focus or z-order so that hover detection keeps working.
  */
 function reassertHudOverlayMouseState() {
-	if (process.platform !== "win32") {
+	if (process.platform !== "win32" || !isHudOverlayMousePassthroughSupported()) {
 		return;
 	}
 
@@ -448,7 +449,9 @@ function sendUpdateToastToWindows(channel: "update-toast-state", payload: unknow
 			return false;
 		}
 
-		const notificationKey = [updatePayload.phase, updatePayload.version, updatePayload.detail].join(":");
+		const notificationKey = [updatePayload.phase, updatePayload.version, updatePayload.detail].join(
+			":",
+		);
 		if (activeUpdateNotificationKey === notificationKey) {
 			return true;
 		}
@@ -723,10 +726,14 @@ app.whenReady().then(async () => {
 		const cameraStatus = systemPreferences.getMediaAccessStatus("camera");
 		const micStatus = systemPreferences.getMediaAccessStatus("microphone");
 		if (cameraStatus !== "granted") {
-			console.warn(`[permissions] Camera access is "${cameraStatus}" — webcam may not work. Check Windows Settings > Privacy > Camera.`);
+			console.warn(
+				`[permissions] Camera access is "${cameraStatus}" — webcam may not work. Check Windows Settings > Privacy > Camera.`,
+			);
 		}
 		if (micStatus !== "granted") {
-			console.warn(`[permissions] Microphone access is "${micStatus}" — mic recording may not work. Check Windows Settings > Privacy > Microphone.`);
+			console.warn(
+				`[permissions] Microphone access is "${micStatus}" — mic recording may not work. Check Windows Settings > Privacy > Microphone.`,
+			);
 		}
 	}
 
diff --git a/electron/windows.ts b/electron/windows.ts
index 2589e215..240d89f1 100644
--- a/electron/windows.ts
+++ b/electron/windows.ts
@@ -1,5 +1,6 @@
 import fs from "node:fs";
 import { createRequire } from "node:module";
+import os from "node:os";
 import path from "node:path";
 import { fileURLToPath } from "node:url";
 import { app, BrowserWindow, ipcMain } from "electron";
@@ -96,8 +97,26 @@ function isHudOverlayCaptureProtectionSupported(): boolean {
 	return process.platform !== "linux";
 }
 
-function isHudOverlayMousePassthroughSupported(): boolean {
-	return process.platform !== "linux";
+function getWindowsBuildNumber(): number | null {
+	if (process.platform !== "win32") {
+		return null;
+	}
+
+	const build = Number.parseInt(os.release().split(".")[2] ?? "", 10);
+	return Number.isFinite(build) ? build : null;
+}
+
+export function isHudOverlayMousePassthroughSupported(): boolean {
+	if (process.platform === "linux") {
+		return false;
+	}
+
+	const build = getWindowsBuildNumber();
+	if (build !== null && build < 22000) {
+		return false;
+	}
+
+	return true;
 }
 
 function loadHudOverlayCaptureProtectionSetting(): boolean {
@@ -138,7 +157,9 @@ function persistHudOverlayCaptureProtectionSetting(enabled: boolean): void {
 
 function getScreen() {
 	if (!app.isReady()) {
-		throw new Error("getScreen() called before app is ready. Ensure all screen access happens after app.whenReady().");
+		throw new Error(
+			"getScreen() called before app is ready. Ensure all screen access happens after app.whenReady().",
+		);
 	}
 	return nodeRequire("electron").screen as typeof import("electron").screen;
 }
@@ -405,12 +426,13 @@ export function createHudOverlayWindow(): BrowserWindow {
 		win.setIgnoreMouseEvents(true, { forward: true });
 	}
 
-	// On Windows 10, focus changes (e.g. showing a native notification) can break
+	// On Windows 11+, focus changes (e.g. showing a native notification) can break
 	// setIgnoreMouseEvents forwarding on a transparent always-on-top window, making
 	// it permanently click-through without hover detection.  Re-initialise the
 	// pass-through-with-forwarding state whenever the window gains focus by toggling
 	// the flag off then back on so the native WS_EX_TRANSPARENT flag is fully reset.
-	if (process.platform === "win32") {
+	// On Windows 10 (build < 22000) passthrough is disabled entirely, so skip this.
+	if (process.platform === "win32" && isHudOverlayMousePassthroughSupported()) {
 		win.on("focus", () => {
 			if (!win.isDestroyed()) {
 				win.setIgnoreMouseEvents(false);
@@ -429,7 +451,7 @@ export function createHudOverlayWindow(): BrowserWindow {
 			if (!win.isDestroyed()) {
 				win.show();
 				win.moveTop();
-				if (process.platform === "win32") {
+				if (process.platform === "win32" && isHudOverlayMousePassthroughSupported()) {
 					win.setIgnoreMouseEvents(false);
 					setTimeout(() => {
 						if (!win.isDestroyed()) {