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How to restore the BIOS and original software of your Chromebook if you have deleted them

Computer science   2020-07-12 19:11:10

If you tampered with your Chromebook - to install Windows on your Chromebook , for example: you may have replaced its BIOS with a third-party option. Here"s how to undo all your changes and convert this Windows or Linux PC back to Chromebook. If you haven"t tampered with this with your Chromebook, you can reinitialize factory settings . The following guide is intended for those who have installed a different BIOS and operating system. First step: restore the original BIOS of your Chromebook RELATED: How to install Windows on a Chromebook You can restore the BIOS using the same you used to replace your BIOS in the first place. This , if you remember our guide , creates a backup copy of your BIOS, which makes recovery easier. However, this must be run from a Linux system with a full Bash shell, so you will not be performing this step from Windows. Instead, you will want to start your Chromebook in a Linux environment. We will use Ubuntu as an example, but the other Linux distributions should also work fine. Download an Ubuntu ISO and the Rufus utility . Launch Rufus, select a drive USB and choose "GPT partition scheme for UEFI as well as" FAT32. Click the button to the right of "Create a boot disk using and select your downloaded Ubuntu ISO. Click " Start "when you are ready. Rufus will ask you if you want to copy the image in ISO mode or HDD mode. You can choose the "default ISO image mode and continue. NOTE: If you reinstalled the BIOS write protection screw for your Chromebook, you will need to remove it before flashing the original BIOS. If you left the protection screw with write disabled, you can continue. When you are finished, connect the USB key to your Chromebook and restart. The BIOS should automatically start from the USB key. If it is not case, press any key at the start of the boot process, select "Boot Manager ", then select your USB drive. Select "Try Ubuntu without installing " to get a live Ubuntu desktop. Click the Wi-Fi icon in the upper right corner of your screen and connect to your Wi-Fi network when you reach the desktop. This will give the Linux systemInternet access, which he needs to download the . You are now running the same as you ran previously. Open a terminal window in Ubuntu and paste the following command, then pressing Enter. cd ~; curl -L -O; sudo bash Cetthe command changes to your personal directory, download the file, and runs it with root privileges. Check the developer"s website for more documentation on how the works . The will download and run, presenting you with a useful self. Use the option "Restore Stock Firmware (full) ". Type "9 " and press "Enter " for "execute. Answer the questions , by connecting the USB drive containing your fileBIOS backup and pointing the to it. The will flash the backup BIOS on your Chromebook. If you have lost your backup copy of the original BIOS firmware, the may attempt to download and install copies from the Internet. Just tell the that you don"t have a firmware backup file when prompted. Downloading the original BIOS from the Internet only works for devices using the Haswell, Broadwell or Baytrail architectures at the moment, according to the documentation of the . The process should complete successfully. You will be told that you need to restore Chrome OS using the Chrome OS recovery media, then rerun this to reset the firmware boot indicators. You can now shut down your Chromebook. "style = " max- height: 400px; max-width : 99%; "> Second step: restore Chrome OS You will now have to create the operating system Chrome OS at using recovery media. You can do this on any computer (Windows, Mac, Linux or Chromebook) with the Chrome browser installed. Go to the Chrome Web Store and install Chromebook Recovery Utility Chrome App to get started. Launch it application and connect a USB drive. This USB drive will be deleted as part of this process. If you wish, you can use the same USB drive that you used previously for Ubuntu: Ubuntu will be removed, but you will notYou will no longer need Ubuntu for this process. Find your Chromebook model in the Chromebook Application recovery utility. You can select it from the list or simply enter the code name. If you don"t remember your Chromebook model, you can turn on your Chromebook and you"ll see themodel number displayed at the bottom of the recovery screen. Go through the Chromebook Recovery Utility wizard. The application will erase the connected USB drive and place the Chrome OS recovery media on it. If your Chromebook has an SD card slot, you can also use this utility to place the mediarecovery port on an SD card. When the tool has finished creating recovery media, you can remove the USB drive from your computer and connect it to your Chromebook. With your Chromebook still off, press and hold the Esc and Refresh keys (the Refresh key is where the F3 key would be on a keyboardnormal). Press and hold the power button while releasing the power button. Release the Escape and Refresh keys when you see a message appear on your screen. Your Chromebook will boot into recovery mode and you"ll see a message prompting you to insert a recovery drive to continue. Connect the USB drive you created to your Chromebook. Your Chromebook will automatically detect the recovery medium and use it to restore your device. Make sure the Chromebook is plugged in and allow it to automatically restore the operating system. If your Chromebook doesn"t automatically detect the connected drive and start the process recovery media, there may be a problem with your recovery media. You may also need to remove all other SD cards, USB drives, and USB devices before starting the recovery drive. only have one USB drive connected to avoid confusing the system. "style = "max- height: 400px; max-width: 99%; "> When it"s done, your Chromebook will ask you to remove the support from recovery. Your Chromebook will then automatically restart. Press Ctrl + D to agree to continue in developer mode when the warning "Operating system checking is disabled " appears . You don"t want to re-enable operating system verification right now! Start in Chrome OS, where you will see the Chrome OS installation wizard. Log in and configure Chrome OS as normal. "style = " max- height: 400px; max-width : 99%; "> Third step: restore your firmware startup Indicators Like the mentioned above, you will have to reset the indicators boot firmware to their default settings. From Chrome OS, press Ctrl + Alt + T to open a terminal window. Type shell and press Enter to access a full shell. Paste the following command and press Enter to download and execute the firmware one last time: cd ~; curl -L -O; sudo bash When the interface appears, choose the "option. Set the Boot Options (GBB Flags) option by typing" 4 and pressing Enter. "style = " max- height: 400px ; max-width: 99%; "> Tell the that you want " Reset to factory settings "by typing " 5 " and pressing Enter. " style = "max- height: 400px; max-width: 99%; " > Fourth step: deactivate developer mode (optional) At this stage, you may or may not want to deactivate developer mode . Mod developer e is a special mode that allows you to modify the system software of your Chromebook. This is another way of saying that the "Operating System Check " feature is disabled, allowing you to tamper with the operating system. When developer mode is on, you must press Ctrl + D to start your Chromebook every time you start it. If you don"t want to play with the Chromebook software, you"ll want to turn off developer mode. If you plan to install Linux on your Chromebook using something like Crouton , you will want to leave developer mode turned on. If you want to turn off Developer Mode, restart your Chromebook and press the space bar when the "Ex System Check screenoperation if OFF "appears. (If you don"t want to deactivate DeveloperMode, keep pressing Ctrl + D each time you start your Chromebook.) Press the "Enter " key to confirm that you want to deactivate developer mode when your Chromebook requests it. Your Chromebook will wipe its internal drives and rewill activate operating system checking, which prevents you (or malware) from modifying the partition and operating system filesystem. You also won’t have to press Ctrl + D each time you start up. You"ll have to log back into Chrome OS after that, as disabling developer mode will erase your internal storage. Fifth step: reinstall the BIOS write protection screw (optional) You can also reactivate the BIOS write protection. This does not require you to deactivate developer mode. In fact, you can flash anything you want to your BIOS and then reinstall the screw to protect your modified BIOS from changes. If you flashed the original BIOS, you can reinstall the screw to protect the original BIOS from modification. Your Chromebook will return to the same state it was in when you bought it, by running the original BIOS and protecting it from modifications. Just do the same thing as when you removed the screw. First, shut down the Chromebook. Don"t just put it to sleep, but close it completely. Turn the Chromebook over and unscrew the bottom. "style = " max- height: 400px; max- width: 99%; "> Locate the screw hole you have unscrewed the BIOS write protect screw from previously. Take the exact same thing as you unscrewed earlier and screw it back in the hole. Once it is secure, attach the bottom to your Chromebook and reboot. The BIOS will be write protected and you will be using an original Chrome OS operating system. Your Chromebook will be in the same condition as when it was purchased. "style = "max- height: 400px; max-width: 99%; ">