diff --git a/qubesmanager/main.py b/qubesmanager/main.py
index b673722..c67d312 100755
--- a/qubesmanager/main.py
+++ b/qubesmanager/main.py
@@ -620,6 +620,8 @@ class VmManagerWindow(QMainWindow):
                                      "<small>This will shutdown all the running applications within this VM.</small>".format(vm.name),
                                      QMessageBox.Yes | QMessageBox.Cancel)
 
+        app.processEvents()
+
         if reply == QMessageBox.Yes:
             try:
                 subprocess.check_call (["/usr/sbin/xm", "shutdown", vm.name])