To update your Chromebooks Operating System, follow these steps.
1. Turn on the Chromebook and sign into it.
2. Go to the bottom right of the screen and click on the system tray.
3. Select the "gear" icon in the opened tray.
4. In the new opened window, go to the the bottom left side and select "About Chrome OS"
5. The new page will show the current version of Chrome the device is on. On the right side, select "Check for Updates"
6. If the device starts updating, it will ask to reboot when the update is complete.