diff --git a/locale/ubinstall-gtk.pot b/locale/ubinstall-gtk.pot
index 68c41b1..73f1292 100644
--- a/locale/ubinstall-gtk.pot
+++ b/locale/ubinstall-gtk.pot
@@ -1201,4 +1201,10 @@ msgstr ""
 msgid "<i><b>Module:</b></i>"
 msgstr ""
 
+#: source/ubl-strings.h:331
+msgid "Yes, I agree to the License Agreement"
+msgstr ""
 
+#: source/ubl-strings.h:331
+msgid "No, i do not agree"
+msgstr ""
diff --git a/locale/ubinstall-gtk_ru.po b/locale/ubinstall-gtk_ru.po
index 20d9b39..38b3438 100644
--- a/locale/ubinstall-gtk_ru.po
+++ b/locale/ubinstall-gtk_ru.po
@@ -3040,3 +3040,11 @@ msgstr "<i><b>Пакет:</b></i>"
 #: source/ubl-strings.h:331
 msgid "<i><b>Module:</b></i>"
 msgstr "<i><b>Модуль:</b></i>"
+
+#: source/ubl-strings.h:331
+msgid "Yes, I agree to the License Agreement"
+msgstr "Да, я согласен с лицензионным соглашением"
+
+#: source/ubl-strings.h:331
+msgid "No, i do not agree"
+msgstr "Нет, я не согласен"
diff --git a/source/ubinstall-gtk-page-switch.c b/source/ubinstall-gtk-page-switch.c
index e15313d..e71202a 100644
--- a/source/ubinstall-gtk-page-switch.c
+++ b/source/ubinstall-gtk-page-switch.c
@@ -107,7 +107,11 @@ void yon_navigation_buttons_set_sensetiveness(main_window *widgets){
         case YON_PAGE_LICENCE:
             gtk_widget_show(widgets->BackButton);
             gtk_widget_set_sensitive(widgets->BackButton,1);
+            if (gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(widgets->LicenseAgreeRadio)))
             gtk_widget_set_sensitive(widgets->NextButton,1);
+            else
+            gtk_widget_set_sensitive(widgets->NextButton,0);
+
             gtk_widget_set_sensitive(widgets->CancelInstallButton,1);
         break;
         case YON_PAGE_INSTALLATION:
@@ -443,6 +447,9 @@ void on_page_cancel_clicked(GtkWidget *, main_window *widgets){
                 pthread_cancel((pthread_t)main_config.install_thread);
             }
         }
+    } else {
+        gtk_notebook_set_current_page(GTK_NOTEBOOK(widgets->Notebook),YON_PAGE_LICENCE);
+        on_page_prev_clicked(NULL,widgets);
     }
 }
 
diff --git a/source/ubinstall-gtk.c b/source/ubinstall-gtk.c
index 190c330..dc003c3 100644
--- a/source/ubinstall-gtk.c
+++ b/source/ubinstall-gtk.c
@@ -1,6 +1,11 @@
 #include "ubinstall-gtk.h" 
  
 config main_config; 
+
+void yon_license_init(main_window *widgets){
+    gtk_widget_set_sensitive(widgets->NextButton,0);
+}
+
 void yon_open_browser(GtkWidget *, char *link){
     GtkWidget *window = yon_ubl_browser_window_open(link,TITLE_LABEL);
     if (window)
@@ -803,6 +808,8 @@ void yon_main_window_create(main_window *widgets){
         widgets->StatusBox2 = yon_gtk_builder_get_widget(builder,"StatusBox2");
         widgets->Notebook = yon_gtk_builder_get_widget(builder,"Notebook");
         widgets->MainSpinner=yon_gtk_builder_get_widget(builder,"MainSpinner");
+        widgets->LicenseAgreeRadio = yon_gtk_builder_get_widget(builder,"LicenseAgreeRadio");
+        widgets->LicenseDisgreeRadio = yon_gtk_builder_get_widget(builder,"LicenseDisgreeRadio");
 
         widgets->EnableVNCMenuItem = yon_gtk_builder_get_widget(builder,"EnableVNCMenuItem");
         widgets->DocumentationMenuItem = yon_ubl_menu_item_documentation_new(DOCUMENTATION_LABEL);
@@ -1063,6 +1070,8 @@ void yon_main_window_create(main_window *widgets){
     gtk_menu_shell_append(GTK_MENU_SHELL(menu),widgets->DocumentationMenuItem);
     gtk_menu_shell_append(GTK_MENU_SHELL(menu),widgets->AboutMenuItem);
     
+    g_signal_connect(G_OBJECT(widgets->LicenseAgreeRadio),"toggled",G_CALLBACK(yon_gtk_widget_set_sensitive_from_toggle_button),widgets->NextButton);
+
     g_signal_connect(G_OBJECT(widgets->LoadGlobalConfigurationMenuItem),"activate",G_CALLBACK(on_config_global_load),widgets);
     g_signal_connect(G_OBJECT(widgets->LoadLocalConfigurationMenuItem),"activate",G_CALLBACK(on_config_local_load),widgets);
     g_signal_connect(G_OBJECT(widgets->LoadExternalConfigurationMenuItem),"activate",G_CALLBACK(on_config_custom_load),widgets);
diff --git a/source/ubinstall-gtk.h b/source/ubinstall-gtk.h
index 13109c8..3be8be8 100755
--- a/source/ubinstall-gtk.h
+++ b/source/ubinstall-gtk.h
@@ -437,6 +437,9 @@ typedef struct {
 
 	GtkWidget *MainWindow;
 
+	GtkWidget *LicenseAgreeRadio;
+	GtkWidget *LicenseDisgreeRadio;
+
 	GtkWidget *StartScenarioButton;
 	GtkWidget *SourceButton;
 	GtkWidget *SkipInstallationButton;
@@ -1232,4 +1235,5 @@ void *yon_maximize(main_window *widgets);
 kernel_addon_row *yon_kernel_addon_row_new();
 void yon_kernel_addon_row_setup(kernel_addon_row *row, char *name, char *modules,char *package, char *description);
 void on_kernel_addon_install_enabled(GtkWidget *, kernel_addon_row *row);
-void on_kernel_addon_info(GtkLabel *self);
\ No newline at end of file
+void on_kernel_addon_info(GtkLabel *self);
+void yon_license_init(main_window *widgets);
\ No newline at end of file
diff --git a/source/ubl-strings.h b/source/ubl-strings.h
index 5a3b300..8085f29 100644
--- a/source/ubl-strings.h
+++ b/source/ubl-strings.h
@@ -232,6 +232,8 @@ NULL)
 #define ROOT_FORCE_CONFIGURATION_MODE_LABEL _("Warning! Application was launched without root. Only configuration mode is allowed.")
 #define PACKAGE_NOT_FOUND_LABEL _("Package were not found")
 #define PACKAGE_INFO_LABEL _("Package information")
+#define LICENCE_AGREE_LABEL _("Yes, I agree to the License Agreement")
+#define LICENCE_DISAGREE_LABEL _("No, i do not agree")
 // #define _LABEL _("<i><b>Package:</b></i>")
 // #define _LABEL _("<i><b>Module:</b></i>")
 // #define _LABEL _("New section at")
diff --git a/ubinstall-gtk-source.glade b/ubinstall-gtk-source.glade
index 1a3e61e..ac022cc 100644
--- a/ubinstall-gtk-source.glade
+++ b/ubinstall-gtk-source.glade
@@ -301,7 +301,7 @@
             <property name="visible">True</property>
             <property name="can-focus">False</property>
             <property name="margin-bottom">2</property>
-            <property name="label" translatable="yes">UBLinux installation</property>
+            <property name="label" translatable="yes">Source</property>
             <attributes>
               <attribute name="weight" value="bold"/>
             </attributes>