1. Select the System Tray and select Settings
2. Select "About Chrome OS" in the lower-left corner
3. Select the "Check for updates" button
4. If the Chrome OS is up-to-date, you will will see the the screen below
If your Chrome OS is out-of-date, the update will start to download and you will see "Updating your device" like the screen below. If your battery is under 50%, plug your device in now.
Once the Chrome OS update has been downloaded, please select the "Restart" button to complete the update. Your Chromebook will restart and you will have to log in again.
Once you have logged back into your account, go back to the "About Chrome OS" tab and click the "check for updates" once more to make sure you have downloaded more recent update.