Install the Chromebook Recovery Utility extension from the Chrome Web Store. To Powerwash your Chromebook, click on your profile picture in the lower right-hand corner and navigate to Settings > Advanced > Reset > Powerwash. Open the Chrome browser on your PC, not necessarily the computer you wish to install Chrome OS Flex on.
It's similar to the new Reset and Refresh functionality in Windows 10. It'll delete locally stored user data and restore the Chromebook back to its factory state, but it won't reinstall the operating system. The Powerwash is akin to hitting a factory reset button. Try a Powerwashīefore taking the drastic step of reinstalling the entire operating system, why not first see if the Powerwash feature can remedy the problem? In any of these cases, you might need to completely reinstall the operating system. Perhaps you tried installing Linux and something went awry, maybe you went poking around in the Developer Mode and made an irreversible change, or perhaps you got unlucky and downloaded a Canary Build that crashed the system. More often than not, the cause can be traced back to the user. That said, things do still occasionally go wrong.