diff --git a/app/SysTray-X/SysTray-X-app/windowctrl-win.cpp b/app/SysTray-X/SysTray-X-app/windowctrl-win.cpp
index 2c4fdb3..65a50a8 100644
--- a/app/SysTray-X/SysTray-X-app/windowctrl-win.cpp
+++ b/app/SysTray-X/SysTray-X-app/windowctrl-win.cpp
@@ -276,6 +276,18 @@ void    WindowCtrlWin::normalizeWindowsHidden()
 }
 
 
+/*
+ *  Delete / Close a window
+ */
+void    WindowCtrlWin::deleteHiddenWindows()
+{
+    for( int i = 0 ; i < m_tb_windows_hidden.length() ; ++i )
+    {
+        SendMessageA(  (HWND)m_tb_windows_hidden.at( i ), WM_CLOSE, 0, 0 );
+    }
+}
+
+
 /*
  *  Delete / Close a window
  */
diff --git a/app/SysTray-X/SysTray-X-app/windowctrl-win.h b/app/SysTray-X/SysTray-X-app/windowctrl-win.h
index f571d4a..3648c5a 100644
--- a/app/SysTray-X/SysTray-X-app/windowctrl-win.h
+++ b/app/SysTray-X/SysTray-X-app/windowctrl-win.h
@@ -192,6 +192,11 @@ class WindowCtrlWin : public QObject
          */
         void    normalizeWindowsHidden();
 
+        /**
+         * @brief deleteHiddenWindows. Delete all hidden windows.
+         */
+        void    deleteHiddenWindows();
+
         /**
          * @brief deleteWindow. Delete window.
          *
diff --git a/app/SysTray-X/SysTray-X-app/windowctrl.cpp b/app/SysTray-X/SysTray-X-app/windowctrl.cpp
index 18c3d48..b9bd7ac 100644
--- a/app/SysTray-X/SysTray-X-app/windowctrl.cpp
+++ b/app/SysTray-X/SysTray-X-app/windowctrl.cpp
@@ -350,6 +350,15 @@ void    WindowCtrl::slotClose()
     emit signalConsole( "Close" );
 #endif
 
+#ifdef Q_OS_WIN
+
+    /*
+     *  Delete all hidden windws ( not found by findWindows() )
+     */
+    deleteHiddenWindows();
+
+#endif
+
     /*
      *  Update the TB windows
      */