When there's an update available for the Apple TV you'll get a popup notification telling you about it. However, you might be in a hurry to watch a movie, listen to music, or do something else when it happens, and you may not want to stop and do the update right then and there. Luckily, you can check for and apply Apple TV software updates at any time. Here's how!
That's it. If you had an update, just let the Apple TV do its thing and install the update. Just be sure not to disconnect it during the update process. If you do accidentally, you can restore it in iTunes to fix it.
If you need any additional help or have specific questions check out our Apple TV Forum!