diff --git a/locale/ubinstall-gtk.pot b/locale/ubinstall-gtk.pot
index 07fa82d..ed7007c 100644
--- a/locale/ubinstall-gtk.pot
+++ b/locale/ubinstall-gtk.pot
@@ -5351,4 +5351,7 @@ msgid "Uncheck all"
 msgstr ""
 
 msgid "Close installer"
+msgstr ""
+
+msgid "Application is already running"
 msgstr ""
\ No newline at end of file
diff --git a/locale/ubinstall-gtk_ru.po b/locale/ubinstall-gtk_ru.po
index 37bd888..f561ea7 100644
--- a/locale/ubinstall-gtk_ru.po
+++ b/locale/ubinstall-gtk_ru.po
@@ -5546,4 +5546,7 @@ msgid "Uncheck all"
 msgstr "Снять всё"
 
 msgid "Close installer"
-msgstr "Закрыть установщик"
\ No newline at end of file
+msgstr "Закрыть установщик"
+
+msgid "Application is already running"
+msgstr "Приложение уже запущено"
\ No newline at end of file
diff --git a/source/ubinstall-gtk.c b/source/ubinstall-gtk.c
index ee6d7cf..d0bc006 100644
--- a/source/ubinstall-gtk.c
+++ b/source/ubinstall-gtk.c
@@ -1028,6 +1028,10 @@ main_window *yon_main_window_complete(){
 }
 
 int main(int argc, char *argv[]){
+    GApplication *app = (GApplication*)gtk_application_new("com.ublinux.ubinstall-gtk",G_APPLICATION_DEFAULT_FLAGS);
+    GError *err = NULL;
+    int reg = g_application_register(app,NULL,&err);
+    int remote = g_application_get_is_remote(app);
     main_config.argv=argv;
     main_config.argc = argc;
 	config_str unfound = NULL;
@@ -1037,6 +1041,25 @@ int main(int argc, char *argv[]){
     textdomain(LocaleName);
     config_init();
     gtk_init(&argc,&argv);
+
+    if (!reg||remote){
+        yon_window *window = yon_window_new();
+        gtk_widget_set_size_request(window->Window,300,125);
+        yon_gtk_window_setup(GTK_WINDOW(window->Window),NULL,WARNING_TITLE_LABEL,icon_path,NULL);
+        GtkWidget *box = gtk_box_new(GTK_ORIENTATION_HORIZONTAL,5);
+        GtkWidget *image = gtk_image_new();
+        GtkWidget *label = gtk_label_new(ALREADY_RUNNING_LABEL);
+        gtk_image_set_from_icon_name(GTK_IMAGE(image),warning_icon_path,0);
+        gtk_image_set_pixel_size(GTK_IMAGE(image),48);
+        gtk_box_pack_start(GTK_BOX(box),image,1,1,0);
+        gtk_box_pack_start(GTK_BOX(box),label,1,1,0);
+        gtk_box_pack_start(GTK_BOX(window->MainBox),box,1,1,0);
+        gtk_widget_show_all(box);
+        g_signal_connect(G_OBJECT(window->Window),"destroy",G_CALLBACK(gtk_main_quit),NULL);
+        gtk_widget_show(window->Window);
+        gtk_main();
+        exit(1);
+    }
     yon_ubl_window_init(TITLE_LABEL,"",LocaleName,CssPath,LocaleName,version_application,WIKI_LINK);
 	yon_ubl_setup_arguments(argc,argv,&unfound,&size,ADDITIONAL_ARGS);
     if (size) {
diff --git a/source/ubinstall-gtk.h b/source/ubinstall-gtk.h
index f106171..528e95f 100755
--- a/source/ubinstall-gtk.h
+++ b/source/ubinstall-gtk.h
@@ -50,6 +50,7 @@
 #define active_icon_path "com.ublinux.libublsettingsui-gtk3.active-symbolic"
 #define inactive_icon_path "com.ublinux.libublsettingsui-gtk3.inactive-symbolic"
 #define info_icon_path "com.ublinux.libublsettingsui-gtk3.important-symbolic"
+#define warning_icon_path "com.ublinux.libublsettingsui-gtk3.warning-symbolic"
 
 #define LocalePath "/usr/share/locale"
 #define LocaleName "ubinstall-gtk"
diff --git a/source/ubl-strings.h b/source/ubl-strings.h
index eb3aa7f..7d6d5dc 100644
--- a/source/ubl-strings.h
+++ b/source/ubl-strings.h
@@ -304,6 +304,7 @@ NULL)
 #define ACCESSED_LABEL _("Accessed")
 #define UNACCESSED_LABEL _("Unaccessed")
 #define INFO_LABEL _("Package information")
+#define ALREADY_RUNNING_LABEL _("Application is already running")
 
 // #define _LABEL _("Chosen size:")
 // #define _LABEL _("Overall size:")