diff --git a/GETTING_STARTED.md b/GETTING_STARTED.md
index 0b95e1d3..84052f6c 100644
--- a/GETTING_STARTED.md
+++ b/GETTING_STARTED.md
@@ -171,6 +171,8 @@ Agent 会自己读代码、找出需要的包、全部装好。
 python3 launch.pyw
 ```
 
+Windows 原生桌面窗口启动失败时，可运行 `python3 launch.pyw --browser` 使用浏览器版 Streamlit UI。
+
 启动后会出现一个桌面悬浮窗，直接在里面输入任务指令。
 
 ### 可选：让 Agent 帮你做的事
@@ -266,4 +268,4 @@ GenericAgent 不预设技能，而是**靠使用进化**。每完成一个新任
 
 > Agent 会自动 pull 最新代码并解读 commit log，告诉你新增了什么能力。
 
-> 更多细节请参阅 [README.md](README.md) 或 [详细版图文教程](https://my.feishu.cn/wiki/CGrDw0T76iNFuskmwxdcWrpinPb)。
\ No newline at end of file
+> 更多细节请参阅 [README.md](README.md) 或 [详细版图文教程](https://my.feishu.cn/wiki/CGrDw0T76iNFuskmwxdcWrpinPb)。
diff --git a/README.md b/README.md
index 4c217745..69a964f9 100644
--- a/README.md
+++ b/README.md
@@ -101,6 +101,8 @@ cp mykey_template.py mykey.py
 python launch.pyw
 ```
 
+Windows native shell fallback: if the desktop window fails during pywebview startup, run `python launch.pyw --browser` to use the Streamlit browser UI.
+
 > GenericAgent is meant to grow its environment through the Agent itself, not by pre-installing every possible package.
 
 Full guide: [GETTING_STARTED.md](GETTING_STARTED.md)
@@ -318,6 +320,8 @@ cp mykey_template.py mykey.py
 python launch.pyw
 ```
 
+Windows 原生桌面窗口启动失败时，可运行 `python launch.pyw --browser` 使用浏览器版 Streamlit UI。
+
 > GenericAgent 更推荐由 Agent 在使用中自举环境，而不是预先手动装完整依赖。
 
 完整引导流程见 [GETTING_STARTED.md](GETTING_STARTED.md)。
diff --git a/launch.pyw b/launch.pyw
index e5b148f2..fc824b04 100644
--- a/launch.pyw
+++ b/launch.pyw
@@ -1,9 +1,10 @@
-import webview, threading, subprocess, sys, time, os, ctypes, atexit, socket, random
+import threading, subprocess, sys, time, os, ctypes, atexit, socket, random, webbrowser, urllib.request
 
 WINDOW_WIDTH, WINDOW_HEIGHT, RIGHT_PADDING, TOP_PADDING = 600, 900, 0, 100
 
 script_dir = os.path.dirname(os.path.abspath(__file__))
 frontends_dir = os.path.join(script_dir, "frontends")
+window = proc = None
 
 def find_free_port(lo=18501, hi=18599):
     ports = list(range(lo, hi+1)); random.shuffle(ports)
@@ -22,6 +23,28 @@ def start_streamlit(port):
     proc = subprocess.Popen(cmd)
     atexit.register(proc.kill)
 
+def wait_for_streamlit(url, timeout=20):
+    deadline = time.time() + timeout
+    while time.time() < deadline:
+        try:
+            with urllib.request.urlopen(url, timeout=0.5): return True
+        except Exception: time.sleep(0.5)
+    return False
+
+def keep_streamlit_alive():
+    try:
+        while proc and proc.poll() is None: time.sleep(1)
+    except KeyboardInterrupt:
+        if proc and proc.poll() is None: proc.kill()
+
+def open_browser_mode(port, reason=None):
+    url = f'http://localhost:{port}'
+    if reason: print(f'[Launch] Native window unavailable: {reason}')
+    wait_for_streamlit(url)
+    print(f'[Launch] Opening browser: {url}')
+    webbrowser.open(url)
+    keep_streamlit_alive()
+
 def inject(text):
     window.evaluate_js(f"""
         const textarea = document.querySelector('textarea[data-testid="stChatInputTextArea"]');
@@ -62,9 +85,10 @@ PASTE_HOOK_JS = """if (!window._pasteHooked) { window._pasteHooked = true;
     }, true);
 }"""
 
-def idle_monitor():
+def idle_monitor(stop_event=None):
     last_trigger_time = 0
     while True:
+        if stop_event and stop_event.is_set(): return
         time.sleep(5)
         try:
             window.evaluate_js(PASTE_HOOK_JS)
@@ -78,10 +102,32 @@ def idle_monitor():
         except Exception as e:
             print(f'[Idle Monitor] Error: {e}')
 
+def start_native_window(port):
+    global window
+    if os.name == 'nt': os.environ.setdefault('PYTHONNET_RUNTIME', 'coreclr')
+    import webview
+    if os.name == 'nt':
+        screen_width = get_screen_width()
+        x_pos = screen_width - WINDOW_WIDTH - RIGHT_PADDING
+    else: x_pos = 100
+    time.sleep(2)
+    window = webview.create_window(
+        title='GenericAgent', url=f'http://localhost:{port}',
+        width=WINDOW_WIDTH, height=WINDOW_HEIGHT, x=x_pos, y=TOP_PADDING,
+        resizable=True, text_select=True)
+    monitor_stop = threading.Event()
+    monitor_thread = threading.Thread(target=idle_monitor, args=(monitor_stop,), daemon=True)
+    monitor_thread.start()
+    try: webview.start()
+    except Exception:
+        monitor_stop.set()
+        raise
+
 if __name__ == '__main__':
     import argparse
     parser = argparse.ArgumentParser()
     parser.add_argument('port', nargs='?', default='0'); 
+    parser.add_argument('--browser', action='store_true', help='Open Streamlit in the default browser')
     parser.add_argument('--tg', action='store_true', help='启动 Telegram Bot'); 
     parser.add_argument('--qq', action='store_true', help='启动 QQ Bot');
     parser.add_argument('--feishu', '--fs', dest='feishu', action='store_true', help='启动 Feishu Bot');
@@ -130,15 +176,7 @@ if __name__ == '__main__':
         print('[Launch] Task Scheduler started (duplicate prevented by scheduler port lock)')
     else: print('[Launch] Task Scheduler not enabled (--sched)')
 
-    monitor_thread = threading.Thread(target=idle_monitor, daemon=True)
-    monitor_thread.start()
-    if os.name == 'nt':
-        screen_width = get_screen_width()
-        x_pos = screen_width - WINDOW_WIDTH - RIGHT_PADDING
-    else: x_pos = 100
-    time.sleep(2) 
-    window = webview.create_window(
-        title='GenericAgent', url=f'http://localhost:{port}',
-        width=WINDOW_WIDTH, height=WINDOW_HEIGHT, x=x_pos, y=TOP_PADDING,
-        resizable=True, text_select=True)
-    webview.start()
+    if args.browser: open_browser_mode(port)
+    else:
+        try: start_native_window(port)
+        except Exception as e: open_browser_mode(port, e)