diff --git a/src/main/config/runtime-config.ts b/src/main/config/runtime-config.ts
new file mode 100644
index 0000000..e51aa52
--- /dev/null
+++ b/src/main/config/runtime-config.ts
@@ -0,0 +1,46 @@
+export type AppRuntimeConfig = {
+  title: string;
+  userModelId: string;
+  iconPathOverride?: string;
+  nodecgPort: string;
+  bundleName: string;
+  dashboardRoute: string;
+  loadingRoute: string;
+  loadDelayMs: number;
+  startupTimeoutMs: number;
+  nodecgKillTimeoutMs: number;
+};
+
+export function getRuntimeConfig(): AppRuntimeConfig {
+  return {
+    title: getEnv("SCOREKO_APP_TITLE", "Scoreko"),
+    userModelId: getEnv("SCOREKO_APP_USER_MODEL_ID", "com.scoreko.desktop"),
+    iconPathOverride: getOptionalEnv("SCOREKO_APP_ICON_PATH"),
+    nodecgPort: getEnv("NODECG_PORT", "9090"),
+    bundleName: getEnv("NODECG_BUNDLE_NAME", "scoreko-dev"),
+    dashboardRoute: getEnv("SCOREKO_DASHBOARD_ROUTE", "dashboard/scoreko-dev/main.html?standalone=true"),
+    loadingRoute: getEnv("SCOREKO_LOADING_ROUTE", "dashboard/loading/main.html?standalone=true"),
+    loadDelayMs: parseEnvInt("ELECTRON_LOAD_DELAY_MS", 10000),
+    startupTimeoutMs: parseEnvInt("NODECG_STARTUP_TIMEOUT_MS", 30000),
+    nodecgKillTimeoutMs: parseEnvInt("NODECG_KILL_TIMEOUT_MS", 2500),
+  };
+}
+
+function getOptionalEnv(name: string): string | undefined {
+  const value = process.env[name]?.trim();
+  return value && value.length > 0 ? value : undefined;
+}
+
+function getEnv(name: string, fallback: string): string {
+  return getOptionalEnv(name) ?? fallback;
+}
+
+function parseEnvInt(name: string, fallback: number): number {
+  const rawValue = process.env[name];
+  if (!rawValue) {
+    return fallback;
+  }
+
+  const parsedValue = Number.parseInt(rawValue, 10);
+  return Number.isFinite(parsedValue) ? parsedValue : fallback;
+}
diff --git a/src/main/constants.ts b/src/main/constants.ts
new file mode 100644
index 0000000..372b3e5
--- /dev/null
+++ b/src/main/constants.ts
@@ -0,0 +1,14 @@
+export const NODE_RUNTIME_NAME = "electron internal node";
+export const DEFAULT_WINDOW_BACKGROUND = "#0f0f0f";
+
+export const DEFAULT_WINDOW_SIZE = {
+  width: 1920,
+  height: 1080,
+  minWidth: 1920,
+  minHeight: 1080,
+} as const;
+
+export const LOADING_WINDOW_SIZE = {
+  width: 300,
+  height: 300,
+} as const;
diff --git a/src/main/errors/error-presenter.ts b/src/main/errors/error-presenter.ts
new file mode 100644
index 0000000..6cc84e0
--- /dev/null
+++ b/src/main/errors/error-presenter.ts
@@ -0,0 +1,27 @@
+import { app, dialog } from "electron";
+
+export function log(...args: unknown[]): void {
+  console.log("[scoreko-electron]", ...args);
+}
+
+export function formatErrorMessage(error: unknown): string {
+  if (error instanceof Error) {
+    const stack = error.stack?.trim();
+    return stack && stack.length > 0 ? stack : error.message;
+  }
+
+  return String(error);
+}
+
+export function showFatalError(message: string, error?: unknown): void {
+  const formattedError = error ? formatErrorMessage(error) : undefined;
+  const details = formattedError ? `${message}\n\n${formattedError}` : message;
+
+  console.error(details);
+
+  if (!app.isReady()) {
+    return;
+  }
+
+  dialog.showErrorBox("Scoreko - Error al iniciar", details);
+}
diff --git a/src/main/main.ts b/src/main/main.ts
index dd8e596..207e283 100644
--- a/src/main/main.ts
+++ b/src/main/main.ts
@@ -1,46 +1,12 @@
-import { app, BrowserWindow, BrowserWindowConstructorOptions, dialog, shell } from "electron";
-import { ChildProcess, spawn } from "node:child_process";
-import fs from "node:fs";
+import { app, BrowserWindow } from "electron";
 import path from "node:path";
 
-type AppRuntimeConfig = {
-  title: string;
-  userModelId: string;
-  iconPathOverride?: string;
-  nodecgPort: string;
-  bundleName: string;
-  dashboardRoute: string;
-  loadingRoute: string;
-  loadDelayMs: number;
-  startupTimeoutMs: number;
-  nodecgKillTimeoutMs: number;
-};
+import { getRuntimeConfig } from "./config/runtime-config";
+import { showFatalError, log } from "./errors/error-presenter";
+import { createNodecgProcessManager } from "./nodecg/process-manager";
+import { createLoadingWindow, createMainWindow } from "./windows/window-factory";
 
-const RUNTIME_NAME = "electron internal node";
-const DEFAULT_WINDOW_BACKGROUND = "#0f0f0f";
-const DEFAULT_WINDOW_SIZE = {
-  width: 1920,
-  height: 1080,
-  minWidth: 1920,
-  minHeight: 1080,
-};
-const LOADING_WINDOW_SIZE = {
-  width: 300,
-  height: 300,
-};
-
-const runtimeConfig: AppRuntimeConfig = {
-  title: getEnv("SCOREKO_APP_TITLE", "Scoreko"),
-  userModelId: getEnv("SCOREKO_APP_USER_MODEL_ID", "com.scoreko.desktop"),
-  iconPathOverride: getOptionalEnv("SCOREKO_APP_ICON_PATH"),
-  nodecgPort: getEnv("NODECG_PORT", "9090"),
-  bundleName: getEnv("NODECG_BUNDLE_NAME", "scoreko-dev"),
-  dashboardRoute: getEnv("SCOREKO_DASHBOARD_ROUTE", "dashboard/scoreko-dev/main.html?standalone=true"),
-  loadingRoute: getEnv("SCOREKO_LOADING_ROUTE", "dashboard/loading/main.html?standalone=true"),
-  loadDelayMs: parseEnvInt("ELECTRON_LOAD_DELAY_MS", 10000),
-  startupTimeoutMs: parseEnvInt("NODECG_STARTUP_TIMEOUT_MS", 30000),
-  nodecgKillTimeoutMs: parseEnvInt("NODECG_KILL_TIMEOUT_MS", 2500),
-};
+const runtimeConfig = getRuntimeConfig();
 
 const isDev = !app.isPackaged;
 const rootPath = isDev ? path.resolve(__dirname, "../..") : process.resourcesPath;
@@ -49,200 +15,25 @@ const dashboardUrl = `http://localhost:${runtimeConfig.nodecgPort}/bundles/${run
 const loadingUrl = `http://localhost:${runtimeConfig.nodecgPort}/bundles/${runtimeConfig.bundleName}/${runtimeConfig.loadingRoute}`;
 const baseUrl = `http://127.0.0.1:${runtimeConfig.nodecgPort}`;
 
+const nodecgManager = createNodecgProcessManager({
+  isDev,
+  nodecgPath,
+  baseUrl,
+  runtimeConfig,
+  log,
+});
+
 let mainWindow: BrowserWindow | null = null;
 let loadingWindow: BrowserWindow | null = null;
-let nodecgProcess: ChildProcess | null = null;
-let stopNodeCGPromise: Promise<void> | null = null;
 let isQuitting = false;
 
-function createMainWindow(): BrowserWindow {
-  const windowOptions = createWindowOptions({ isLoadingWindow: false });
-  const window = new BrowserWindow(windowOptions);
-
-  window.setMenuBarVisibility(false);
-
-  window.webContents.setWindowOpenHandler(({ url }) => {
-    void shell.openExternal(url);
-    return { action: "deny" };
-  });
-
-  window.webContents.on("will-navigate", (event, url) => {
-    if (url !== dashboardUrl) {
-      event.preventDefault();
-      void shell.openExternal(url);
-    }
-  });
-
-  window.on("page-title-updated", (event) => {
-    event.preventDefault();
-  });
-
-  return window;
-}
-
-function createLoadingWindow(): BrowserWindow {
-  const window = new BrowserWindow(createWindowOptions({ isLoadingWindow: true }));
-
-  window.on("page-title-updated", (event) => {
-    event.preventDefault();
-  });
-
-  return window;
-}
-
-function createWindowOptions({ isLoadingWindow }: { isLoadingWindow: boolean }): BrowserWindowConstructorOptions {
-  const iconPath = resolveAppIconPath();
-
-  const baseOptions: BrowserWindowConstructorOptions = {
-    show: false,
-    title: runtimeConfig.title,
-    ...(iconPath ? { icon: iconPath } : {}),
-    backgroundColor: DEFAULT_WINDOW_BACKGROUND,
-    webPreferences: {
-      contextIsolation: true,
-      sandbox: true,
-      ...(isLoadingWindow ? {} : { nodeIntegration: false }),
-    },
-  };
-
-  if (isLoadingWindow) {
-    return {
-      ...baseOptions,
-      frame: false,
-      width: LOADING_WINDOW_SIZE.width,
-      height: LOADING_WINDOW_SIZE.height,
-      resizable: false,
-      movable: true,
-      minimizable: false,
-      maximizable: false,
-    };
-  }
-
-  return {
-    ...baseOptions,
-    width: DEFAULT_WINDOW_SIZE.width,
-    height: DEFAULT_WINDOW_SIZE.height,
-    minWidth: DEFAULT_WINDOW_SIZE.minWidth,
-    minHeight: DEFAULT_WINDOW_SIZE.minHeight,
-  };
-}
-
-function resolveAppIconPath(): string | undefined {
-  const iconCandidates = [
-    runtimeConfig.iconPathOverride,
-    path.join(rootPath, "static", "icons", "icon.ico"),
-    path.join(rootPath, "static", "icons", "icon.png"),
-    path.join(rootPath, "static", "icon.ico"),
-    path.join(rootPath, "static", "icon.png"),
-  ].filter((candidate): candidate is string => Boolean(candidate));
-
-  return iconCandidates.find((candidate) => fs.existsSync(candidate));
-}
-
-function validateNodeCGInstall(): void {
-  const indexPath = path.join(nodecgPath, "index.js");
-  const nodecgBootstrapPath = path.join(nodecgPath, "node_modules", "nodecg", "dist", "server", "bootstrap.js");
-  const bundlePath = path.join(nodecgPath, "bundles", runtimeConfig.bundleName);
-
-  if (!fs.existsSync(nodecgPath)) {
-    throw new Error(`No existe la carpeta NodeCG: ${nodecgPath}`);
-  }
-
-  if (!fs.existsSync(indexPath)) {
-    throw new Error(`No se encontró ${indexPath}. Copia una instalación completa de NodeCG en lib/nodecg.`);
-  }
-
-  if (!fs.existsSync(nodecgBootstrapPath)) {
-    throw new Error(
-      [
-        "NodeCG está presente pero faltan dependencias internas.",
-        `No existe: ${nodecgBootstrapPath}`,
-        "Solución: entra a lib/nodecg e instala dependencias:",
-        "  npm install",
-      ].join("\n"),
-    );
-  }
-
-  if (!fs.existsSync(bundlePath)) {
-    throw new Error(
-      [
-        `No se encontró el bundle '${runtimeConfig.bundleName}'.`,
-        `Ruta esperada: ${bundlePath}`,
-        "Copia/clona tu bundle dentro de lib/nodecg/bundles antes de ejecutar Electron.",
-      ].join("\n"),
-    );
-  }
-}
-
-function startNodeCG(): ChildProcess {
-  validateNodeCGInstall();
-
-  const indexPath = path.join(nodecgPath, "index.js");
-  const child = spawn(process.execPath, [indexPath], {
-    cwd: nodecgPath,
-    env: {
-      ...process.env,
-      NODE_ENV: isDev ? "development" : "production",
-      NODECG_PORT: runtimeConfig.nodecgPort,
-      ELECTRON_RUN_AS_NODE: "1",
-    },
-    stdio: ["ignore", "pipe", "pipe"],
-    detached: process.platform !== "win32",
-    shell: process.platform === "win32",
-  });
-
-  child.stdout?.on("data", (chunk) => {
-    process.stdout.write(String(chunk));
-  });
-
-  child.stderr?.on("data", (chunk) => {
-    process.stderr.write(String(chunk));
-  });
-
-  log(`NodeCG started with pid=${child.pid} using ${RUNTIME_NAME}`);
-
-  child.on("exit", (code, signal) => {
-    log(`NodeCG exited code=${code} signal=${signal ?? "none"}`);
-    nodecgProcess = null;
-  });
-
-  return child;
-}
-
-async function waitForNodeCGReady(startTime: number): Promise<void> {
-  while (Date.now() - startTime < runtimeConfig.startupTimeoutMs) {
-    if (!nodecgProcess) {
-      throw new Error("NodeCG terminó antes de estar listo.");
-    }
-
-    try {
-      const response = await fetch(baseUrl, { method: "GET" });
-      if (response.ok || response.status === 404) {
-        return;
-      }
-    } catch {
-      // retry until timeout
-    }
-
-    await sleep(500);
-  }
-
-  throw new Error(`Timeout esperando NodeCG en ${baseUrl} (${runtimeConfig.startupTimeoutMs}ms).`);
-}
-
-function sleep(ms: number): Promise<void> {
-  return new Promise((resolve) => {
-    setTimeout(resolve, ms);
-  });
-}
-
 async function launch(): Promise<void> {
-  mainWindow = createMainWindow();
-  loadingWindow = createLoadingWindow();
+  mainWindow = createMainWindow({ runtimeConfig, rootPath, dashboardUrl });
+  loadingWindow = createLoadingWindow({ runtimeConfig, rootPath });
 
-  nodecgProcess = startNodeCG();
+  nodecgManager.startNodeCG();
 
-  await waitForNodeCGReady(Date.now());
+  await nodecgManager.waitForNodeCGReady(Date.now());
 
   if (!loadingWindow || loadingWindow.isDestroyed()) {
     return;
@@ -268,121 +59,10 @@ async function launch(): Promise<void> {
   closeLoadingWindow();
 }
 
-function killNodeCGProcessTree(pid: number, signal: NodeJS.Signals): boolean {
-  if (process.platform === "win32") {
-    const force = signal === "SIGKILL" ? "/F" : "";
-    const killer = spawn("taskkill", ["/pid", String(pid), "/T", ...(force ? [force] : [])], {
-      stdio: "ignore",
-      shell: true,
-    });
-
-    killer.on("error", (error) => {
-      log(`taskkill error for pid=${pid}`, error);
-    });
-
-    return true;
-  }
-
-  try {
-    process.kill(-pid, signal);
-    return true;
-  } catch {
-    try {
-      process.kill(pid, signal);
-      return true;
-    } catch {
-      return false;
-    }
-  }
-}
-
-function stopNodeCG(): Promise<void> {
-  if (stopNodeCGPromise) {
-    return stopNodeCGPromise;
-  }
-
-  if (!nodecgProcess || nodecgProcess.killed) {
-    return Promise.resolve();
-  }
-
-  const processToStop = nodecgProcess;
-  const pid = processToStop.pid;
-
-  if (typeof pid !== "number") {
-    log("NodeCG pid unavailable, skipping graceful stop");
-    return Promise.resolve();
-  }
-
-  log(`Stopping NodeCG pid=${pid}`);
-  killNodeCGProcessTree(pid, "SIGTERM");
-
-  stopNodeCGPromise = new Promise((resolve) => {
-    const complete = () => {
-      if (nodecgProcess === processToStop) {
-        nodecgProcess = null;
-      }
-      stopNodeCGPromise = null;
-      resolve();
-    };
-
-    processToStop.once("exit", () => {
-      complete();
-    });
-
-    setTimeout(() => {
-      if (processToStop.exitCode === null && processToStop.signalCode === null) {
-        log(`NodeCG did not exit after SIGTERM, forcing SIGKILL pid=${pid}`);
-        killNodeCGProcessTree(pid, "SIGKILL");
-      }
-    }, Math.max(0, runtimeConfig.nodecgKillTimeoutMs));
+function sleep(ms: number): Promise<void> {
+  return new Promise((resolve) => {
+    setTimeout(resolve, ms);
   });
-
-  return stopNodeCGPromise;
-}
-
-function log(...args: unknown[]): void {
-  console.log("[scoreko-electron]", ...args);
-}
-
-function formatErrorMessage(error: unknown): string {
-  if (error instanceof Error) {
-    const stack = error.stack?.trim();
-    return stack && stack.length > 0 ? stack : error.message;
-  }
-
-  return String(error);
-}
-
-function showFatalError(message: string, error?: unknown): void {
-  const formattedError = error ? formatErrorMessage(error) : undefined;
-  const details = formattedError ? `${message}\n\n${formattedError}` : message;
-
-  console.error(details);
-
-  if (!app.isReady()) {
-    return;
-  }
-
-  dialog.showErrorBox("Scoreko - Error al iniciar", details);
-}
-
-function getOptionalEnv(name: string): string | undefined {
-  const value = process.env[name]?.trim();
-  return value && value.length > 0 ? value : undefined;
-}
-
-function getEnv(name: string, fallback: string): string {
-  return getOptionalEnv(name) ?? fallback;
-}
-
-function parseEnvInt(name: string, fallback: number): number {
-  const rawValue = process.env[name];
-  if (!rawValue) {
-    return fallback;
-  }
-
-  const parsedValue = Number.parseInt(rawValue, 10);
-  return Number.isFinite(parsedValue) ? parsedValue : fallback;
 }
 
 function closeLoadingWindow(): void {
@@ -401,7 +81,7 @@ app.on("ready", () => {
     app.setAppUserModelId(runtimeConfig.userModelId);
   }
 
-  launch().catch(async (error: unknown) => {
+  launch().catch((error: unknown) => {
     showFatalError("No se pudo iniciar Scoreko.", error);
     closeLoadingWindow();
     app.exit(1);
@@ -410,7 +90,7 @@ app.on("ready", () => {
 
 app.on("activate", async () => {
   if (BrowserWindow.getAllWindows().length === 0) {
-    mainWindow = createMainWindow();
+    mainWindow = createMainWindow({ runtimeConfig, rootPath, dashboardUrl });
     await mainWindow.loadURL(dashboardUrl);
     mainWindow.show();
   }
@@ -430,17 +110,17 @@ app.on("before-quit", (event) => {
   event.preventDefault();
   isQuitting = true;
 
-  stopNodeCG().finally(() => {
+  nodecgManager.stopNodeCG().finally(() => {
     app.quit();
   });
 });
 
 app.on("will-quit", () => {
-  stopNodeCG();
+  void nodecgManager.stopNodeCG();
 });
 
 process.on("exit", () => {
-  stopNodeCG();
+  void nodecgManager.stopNodeCG();
 });
 
 process.on("uncaughtException", (error) => {
diff --git a/src/main/nodecg/process-manager.ts b/src/main/nodecg/process-manager.ts
new file mode 100644
index 0000000..91e2db2
--- /dev/null
+++ b/src/main/nodecg/process-manager.ts
@@ -0,0 +1,209 @@
+import { ChildProcess, spawn } from "node:child_process";
+import fs from "node:fs";
+import path from "node:path";
+
+import { AppRuntimeConfig } from "../config/runtime-config";
+import { NODE_RUNTIME_NAME } from "../constants";
+
+type NodecgProcessManagerConfig = {
+  isDev: boolean;
+  nodecgPath: string;
+  baseUrl: string;
+  runtimeConfig: AppRuntimeConfig;
+  log: (...args: unknown[]) => void;
+};
+
+export type NodecgProcessManager = {
+  startNodeCG: () => ChildProcess;
+  waitForNodeCGReady: (startTime: number) => Promise<void>;
+  stopNodeCG: () => Promise<void>;
+  getProcess: () => ChildProcess | null;
+};
+
+export function createNodecgProcessManager({
+  isDev,
+  nodecgPath,
+  baseUrl,
+  runtimeConfig,
+  log,
+}: NodecgProcessManagerConfig): NodecgProcessManager {
+  let nodecgProcess: ChildProcess | null = null;
+  let stopNodeCGPromise: Promise<void> | null = null;
+
+  const startNodeCG = (): ChildProcess => {
+    validateNodeCGInstall(nodecgPath, runtimeConfig.bundleName);
+
+    const indexPath = path.join(nodecgPath, "index.js");
+    const child = spawn(process.execPath, [indexPath], {
+      cwd: nodecgPath,
+      env: {
+        ...process.env,
+        NODE_ENV: isDev ? "development" : "production",
+        NODECG_PORT: runtimeConfig.nodecgPort,
+        ELECTRON_RUN_AS_NODE: "1",
+      },
+      stdio: ["ignore", "pipe", "pipe"],
+      detached: process.platform !== "win32",
+      shell: process.platform === "win32",
+    });
+
+    child.stdout?.on("data", (chunk) => {
+      process.stdout.write(String(chunk));
+    });
+
+    child.stderr?.on("data", (chunk) => {
+      process.stderr.write(String(chunk));
+    });
+
+    log(`NodeCG started with pid=${child.pid} using ${NODE_RUNTIME_NAME}`);
+
+    child.on("exit", (code, signal) => {
+      log(`NodeCG exited code=${code} signal=${signal ?? "none"}`);
+      nodecgProcess = null;
+    });
+
+    nodecgProcess = child;
+    return child;
+  };
+
+  const waitForNodeCGReady = async (startTime: number): Promise<void> => {
+    while (Date.now() - startTime < runtimeConfig.startupTimeoutMs) {
+      if (!nodecgProcess) {
+        throw new Error("NodeCG terminó antes de estar listo.");
+      }
+
+      try {
+        const response = await fetch(baseUrl, { method: "GET" });
+        if (response.ok || response.status === 404) {
+          return;
+        }
+      } catch {
+        // retry until timeout
+      }
+
+      await sleep(500);
+    }
+
+    throw new Error(`Timeout esperando NodeCG en ${baseUrl} (${runtimeConfig.startupTimeoutMs}ms).`);
+  };
+
+  const stopNodeCG = (): Promise<void> => {
+    if (stopNodeCGPromise) {
+      return stopNodeCGPromise;
+    }
+
+    if (!nodecgProcess || nodecgProcess.killed) {
+      return Promise.resolve();
+    }
+
+    const processToStop = nodecgProcess;
+    const pid = processToStop.pid;
+
+    if (typeof pid !== "number") {
+      log("NodeCG pid unavailable, skipping graceful stop");
+      return Promise.resolve();
+    }
+
+    log(`Stopping NodeCG pid=${pid}`);
+    killNodeCGProcessTree(pid, "SIGTERM", log);
+
+    stopNodeCGPromise = new Promise((resolve) => {
+      const complete = () => {
+        if (nodecgProcess === processToStop) {
+          nodecgProcess = null;
+        }
+        stopNodeCGPromise = null;
+        resolve();
+      };
+
+      processToStop.once("exit", () => {
+        complete();
+      });
+
+      setTimeout(() => {
+        if (processToStop.exitCode === null && processToStop.signalCode === null) {
+          log(`NodeCG did not exit after SIGTERM, forcing SIGKILL pid=${pid}`);
+          killNodeCGProcessTree(pid, "SIGKILL", log);
+        }
+      }, Math.max(0, runtimeConfig.nodecgKillTimeoutMs));
+    });
+
+    return stopNodeCGPromise;
+  };
+
+  return {
+    startNodeCG,
+    waitForNodeCGReady,
+    stopNodeCG,
+    getProcess: () => nodecgProcess,
+  };
+}
+
+function validateNodeCGInstall(nodecgPath: string, bundleName: string): void {
+  const indexPath = path.join(nodecgPath, "index.js");
+  const nodecgBootstrapPath = path.join(nodecgPath, "node_modules", "nodecg", "dist", "server", "bootstrap.js");
+  const bundlePath = path.join(nodecgPath, "bundles", bundleName);
+
+  if (!fs.existsSync(nodecgPath)) {
+    throw new Error(`No existe la carpeta NodeCG: ${nodecgPath}`);
+  }
+
+  if (!fs.existsSync(indexPath)) {
+    throw new Error(`No se encontró ${indexPath}. Copia una instalación completa de NodeCG en lib/nodecg.`);
+  }
+
+  if (!fs.existsSync(nodecgBootstrapPath)) {
+    throw new Error(
+      [
+        "NodeCG está presente pero faltan dependencias internas.",
+        `No existe: ${nodecgBootstrapPath}`,
+        "Solución: entra a lib/nodecg e instala dependencias:",
+        "  npm install",
+      ].join("\n"),
+    );
+  }
+
+  if (!fs.existsSync(bundlePath)) {
+    throw new Error(
+      [
+        `No se encontró el bundle '${bundleName}'.`,
+        `Ruta esperada: ${bundlePath}`,
+        "Copia/clona tu bundle dentro de lib/nodecg/bundles antes de ejecutar Electron.",
+      ].join("\n"),
+    );
+  }
+}
+
+function killNodeCGProcessTree(pid: number, signal: NodeJS.Signals, log: (...args: unknown[]) => void): boolean {
+  if (process.platform === "win32") {
+    const force = signal === "SIGKILL" ? "/F" : "";
+    const killer = spawn("taskkill", ["/pid", String(pid), "/T", ...(force ? [force] : [])], {
+      stdio: "ignore",
+      shell: true,
+    });
+
+    killer.on("error", (error) => {
+      log(`taskkill error for pid=${pid}`, error);
+    });
+
+    return true;
+  }
+
+  try {
+    process.kill(-pid, signal);
+    return true;
+  } catch {
+    try {
+      process.kill(pid, signal);
+      return true;
+    } catch {
+      return false;
+    }
+  }
+}
+
+function sleep(ms: number): Promise<void> {
+  return new Promise((resolve) => {
+    setTimeout(resolve, ms);
+  });
+}
diff --git a/src/main/windows/window-factory.ts b/src/main/windows/window-factory.ts
new file mode 100644
index 0000000..8741fbe
--- /dev/null
+++ b/src/main/windows/window-factory.ts
@@ -0,0 +1,104 @@
+import { BrowserWindow, BrowserWindowConstructorOptions, shell } from "electron";
+import fs from "node:fs";
+import path from "node:path";
+
+import { AppRuntimeConfig } from "../config/runtime-config";
+import { DEFAULT_WINDOW_BACKGROUND, DEFAULT_WINDOW_SIZE, LOADING_WINDOW_SIZE } from "../constants";
+
+type WindowFactoryDependencies = {
+  runtimeConfig: AppRuntimeConfig;
+  rootPath: string;
+  dashboardUrl: string;
+};
+
+export function createMainWindow({ runtimeConfig, rootPath, dashboardUrl }: WindowFactoryDependencies): BrowserWindow {
+  const windowOptions = createWindowOptions({ runtimeConfig, rootPath, isLoadingWindow: false });
+  const window = new BrowserWindow(windowOptions);
+
+  window.setMenuBarVisibility(false);
+
+  window.webContents.setWindowOpenHandler(({ url }) => {
+    void shell.openExternal(url);
+    return { action: "deny" };
+  });
+
+  window.webContents.on("will-navigate", (event, url) => {
+    if (url !== dashboardUrl) {
+      event.preventDefault();
+      void shell.openExternal(url);
+    }
+  });
+
+  window.on("page-title-updated", (event) => {
+    event.preventDefault();
+  });
+
+  return window;
+}
+
+export function createLoadingWindow({ runtimeConfig, rootPath }: Omit<WindowFactoryDependencies, "dashboardUrl">): BrowserWindow {
+  const window = new BrowserWindow(createWindowOptions({ runtimeConfig, rootPath, isLoadingWindow: true }));
+
+  window.on("page-title-updated", (event) => {
+    event.preventDefault();
+  });
+
+  return window;
+}
+
+function createWindowOptions({
+  runtimeConfig,
+  rootPath,
+  isLoadingWindow,
+}: {
+  runtimeConfig: AppRuntimeConfig;
+  rootPath: string;
+  isLoadingWindow: boolean;
+}): BrowserWindowConstructorOptions {
+  const iconPath = resolveAppIconPath(runtimeConfig, rootPath);
+
+  const baseOptions: BrowserWindowConstructorOptions = {
+    show: false,
+    title: runtimeConfig.title,
+    ...(iconPath ? { icon: iconPath } : {}),
+    backgroundColor: DEFAULT_WINDOW_BACKGROUND,
+    webPreferences: {
+      contextIsolation: true,
+      sandbox: true,
+      ...(isLoadingWindow ? {} : { nodeIntegration: false }),
+    },
+  };
+
+  if (isLoadingWindow) {
+    return {
+      ...baseOptions,
+      frame: false,
+      width: LOADING_WINDOW_SIZE.width,
+      height: LOADING_WINDOW_SIZE.height,
+      resizable: false,
+      movable: true,
+      minimizable: false,
+      maximizable: false,
+    };
+  }
+
+  return {
+    ...baseOptions,
+    width: DEFAULT_WINDOW_SIZE.width,
+    height: DEFAULT_WINDOW_SIZE.height,
+    minWidth: DEFAULT_WINDOW_SIZE.minWidth,
+    minHeight: DEFAULT_WINDOW_SIZE.minHeight,
+  };
+}
+
+function resolveAppIconPath(runtimeConfig: AppRuntimeConfig, rootPath: string): string | undefined {
+  const iconCandidates = [
+    runtimeConfig.iconPathOverride,
+    path.join(rootPath, "static", "icons", "icon.ico"),
+    path.join(rootPath, "static", "icons", "icon.png"),
+    path.join(rootPath, "static", "icon.ico"),
+    path.join(rootPath, "static", "icon.png"),
+  ].filter((candidate): candidate is string => Boolean(candidate));
+
+  return iconCandidates.find((candidate) => fs.existsSync(candidate));
+}