Check for updates Chrome OS

1. At the bottom right, select the time Settings .
2. At the bottom left, select About ChromeOS.
3. Under "Google ChromeOS," find which version of the Chrome operating system your Chromebook uses.
4. Select Check for updates.
5. If your Chromebook finds a software update, it will start to download automatically.

You might need to try too run updates a few times because it may fail on the first attempts. Press F5 (Refresh) a few times.