diff --git a/CHANGELOG.md b/CHANGELOG.md
index 31c0b7f..baa5da1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,9 +1,16 @@
 # Changelog
 
 ## 0.12.x
-### 0.12.4: Fixed EXIF File Generation Bug
+### 0.12.6: Disabled app restart on Windows
+- The app can not restart properly on Windows, so the restart button has been hidden when the OS is `nt`.
+- Also updated tool tip to indicate that changing theme requeres are restart.
+
+### 0.12.5: Fixed EXIF File Generation Bug
 - Fixed a bug where the application failed to generate a new default EXIF file if none was available. Now, the file is correctly created when missing.
 
+### 0.12.4: Updated README
+- The README file (project description) now includes updates description and screenshots.
+
 ### 0.12.3: UI Adjustments
 - Minor changes to maintain a unified layout across all windows.
 - Added option to sync app theme with OS (if supported).
diff --git a/src/OptimaLab35/gui.py b/src/OptimaLab35/gui.py
index e21669a..0986f5e 100644
--- a/src/OptimaLab35/gui.py
+++ b/src/OptimaLab35/gui.py
@@ -547,6 +547,12 @@ class SettingsWindow(QMainWindow, Ui_Settings_Window):
         self.ui.reset_exif_Button.clicked.connect(self.ask_reset_exif)
         self.ui.save_and_close_Button.clicked.connect(self.save_and_close)
         self.ui.save_and_restart_Button.clicked.connect(self.save_and_restart)
+
+        if os.name == "nt": # Disable restart app when windows.
+            self.ui.save_and_restart_Button.setVisible(False)
+            self.ui.restart_checkBox.setChecked(False)
+            self.ui.restart_checkBox.setVisible(False)
+
 # setting related
 
     def load_settings_into_ui(self):
diff --git a/src/OptimaLab35/ui/settings_window.py b/src/OptimaLab35/ui/settings_window.py
index be60c0b..8de257b 100644
--- a/src/OptimaLab35/ui/settings_window.py
+++ b/src/OptimaLab35/ui/settings_window.py
@@ -247,7 +247,7 @@ class Ui_Settings_Window(object):
         self.groupBox_3.setTitle(QCoreApplication.translate("Settings_Window", u"Theme", None))
         self.label_3.setText(QCoreApplication.translate("Settings_Window", u"Change theme from OS to PyQT Dark or Light", None))
 #if QT_CONFIG(tooltip)
-        self.enable_theme_checkBox.setToolTip(QCoreApplication.translate("Settings_Window", u"App needs to restart before changes take effect.", None))
+        self.enable_theme_checkBox.setToolTip(QCoreApplication.translate("Settings_Window", u"Changes will take effect after restarting the application.", None))
 #endif // QT_CONFIG(tooltip)
         self.enable_theme_checkBox.setText(QCoreApplication.translate("Settings_Window", u"Custom theme", None))
         self.theme_selection_comboBox.setItemText(0, QCoreApplication.translate("Settings_Window", u"Auto", None))
@@ -255,7 +255,10 @@ class Ui_Settings_Window(object):
         self.theme_selection_comboBox.setItemText(2, QCoreApplication.translate("Settings_Window", u"Light", None))
 
 #if QT_CONFIG(tooltip)
-        self.theme_selection_comboBox.setToolTip(QCoreApplication.translate("Settings_Window", u"App needs to restart before changes take effect.", None))
+        self.theme_selection_comboBox.setToolTip(QCoreApplication.translate("Settings_Window", u"Changes will take effect after restarting the application.", None))
+#endif // QT_CONFIG(tooltip)
+#if QT_CONFIG(tooltip)
+        self.save_and_close_Button.setToolTip(QCoreApplication.translate("Settings_Window", u"Changes will take effect after restarting the application.", None))
 #endif // QT_CONFIG(tooltip)
         self.save_and_close_Button.setText(QCoreApplication.translate("Settings_Window", u"Apply theme", None))
         self.install_pkg_Button.setText(QCoreApplication.translate("Settings_Window", u"Install package for custom theme", None))
diff --git a/src/OptimaLab35/ui/settings_window.ui b/src/OptimaLab35/ui/settings_window.ui
index 9ac5bd4..c871303 100644
--- a/src/OptimaLab35/ui/settings_window.ui
+++ b/src/OptimaLab35/ui/settings_window.ui
@@ -94,7 +94,7 @@
            <item row="1" column="0">
             <widget class="QCheckBox" name="enable_theme_checkBox">
              <property name="toolTip">
-              <string>App needs to restart before changes take effect.</string>
+              <string>Changes will take effect after restarting the application.</string>
              </property>
              <property name="text">
               <string>Custom theme</string>
@@ -122,7 +122,7 @@
               </size>
              </property>
              <property name="toolTip">
-              <string>App needs to restart before changes take effect.</string>
+              <string>Changes will take effect after restarting the application.</string>
              </property>
              <item>
               <property name="text">
@@ -143,6 +143,9 @@
            </item>
            <item row="3" column="0">
             <widget class="QPushButton" name="save_and_close_Button">
+             <property name="toolTip">
+              <string>Changes will take effect after restarting the application.</string>
+             </property>
              <property name="text">
               <string>Apply theme</string>
              </property>