Log into Chromebook
Click clock on bottom right corner and then click Setting cog
Next, click the Hamburger menu, and then click on “About Chrome OS” at the bottom of the menu
Click “Check for Upates.” If the Chromebook finds an update, it will start to download automatically.
After the update downloads, you will need to restart your device to complete the process. Click “Restart.”
If it does not need an update, it will say “Your Chromebook is up to date”