diff --git a/app/view/main/window.py b/app/view/main/window.py
index 19f04caa..1748ff3b 100644
--- a/app/view/main/window.py
+++ b/app/view/main/window.py
@@ -1220,10 +1220,11 @@ def restart_app(self):
         执行安全验证后重启程序，清理所有资源"""
         logger.info("正在发起重启请求...")
 
-        if self.pre_class_reset_timer.isActive():
-            self.pre_class_reset_timer.stop()
-
-        self.cleanup_shortcuts()
+        self._stop_pre_class_reset_timer()
+        self._cleanup_shortcuts()
+        self._stop_ipc_client()
+        self._close_all_windows()
+        self._close_main_window()
 
         # 使用 EXIT_CODE_RESTART 退出码来触发重启
         # main.py 中的 handle_exit() 函数会检测此退出码并执行重启逻辑
diff --git a/main.py b/main.py
index c372ea02..1ca019c3 100644
--- a/main.py
+++ b/main.py
@@ -186,10 +186,10 @@ def initialize_application():
 
     wm.app_start_time = time.perf_counter()
 
-    shared_memory, is_first_instance = check_single_instance()
-
     time.sleep(PROCESS_EXIT_WAIT_SECONDS)
 
+    shared_memory, is_first_instance = check_single_instance()
+
     return program_dir, shared_memory, is_first_instance