This document applies to HP Chromebook and Chromebox computers with Chrome OS.
If you see the error message Chrome OS is missing or damaged, or if there is another serious problem with your Chromebook or Chromebox, it may be necessary to reinstall the Chrome operating system.
Performing a recovery on your computer reinstalls the operating system and restores the original factory settings, removing all associated Google Accounts (including the owner) and clearing all local data from the hard drive. Locally saved files and saved networks are deleted for all accounts. The Google Accounts themselves, and any data synced to the web through your Google Drive, are not affected by a system recovery.
This document describes how to create recovery media, and how to use the recovery media to restore your Chromebook or Chromebox to its original condition. Follow the steps in this document to perform a system recovery on your computer.