In joomla CMS you will see a message like Joomla! 3.3.x is available Update now most of the times.
Or a message like as follows:
Now if you want to remove those messages then go to Joomla CMS Admin Panel. Login to admin panel using your user id and password. Now go to Extensions->Plugin Manager. Then you will see two plugin name as follows:
- Quick Icon - Joomla! Extensions Updates Notification
- Quick Icon - Joomla! Update Notification
Quick Icon - Joomla! Extensions Updates Notification shows the Update extensions you used for the site. Quick Icon - Joomla! Update Notification shows the Update of joomla version. Now either disables both or any one you need.
This way you can turn off joomla cms update notification as you needed.