How to check and update your Chromebooks OS:

1. Click the status area, where your account picture appears.

2. Click on Settings (Cog icon).

3. On the bottom left Click on About Chrome OS.

(Your version of Chrome will be displayed on the top Line under Google Chrome OS)

4. Click on, "Check for Updates" to the right of the version number.

5.  When prompted restart your device.  

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