格式化原生Windows 8系统并搭建Ubuntu双启动的操作步骤咨询

Hey, let's walk through this step by step to get your preinstalled Windows 8 back to factory condition and set up dual-boot with Ubuntu smoothly. I know the confusion about retrieving that native Win8 after formatting—don't worry, we'll rely on the built-in recovery partition (the secret sauce for preloaded systems) to make this work.

• This is non-negotiable! Copy your documents, photos, software installers, and any other critical files to an external hard drive or USB stick. System recovery will wipe your main Windows partition, so don't skip this.

All preinstalled Windows 8 devices come with a hidden recovery partition—this is how you get your original system back. As long as this partition isn't deleted or formatted, you're good to go:

• Method 1: Brand-Specific Recovery Shortcut (Fastest Option)
  • Restart your PC, and press the dedicated recovery key right when the brand logo pops up:
    • Lenovo: Press the Novo button (usually a small round button on the side/front of the device)
    • Dell: Press F8 during boot, then select "Repair Your Computer"
    • HP: Press F11 as soon as the PC turns on
    • Asus: Press F9 at boot
    • Acer: Press Alt + F10 during startup
  • Once in the recovery interface, choose "Restore to Factory Settings" or a similar option. Follow the prompts—this will automatically format your Windows partition and revert it to the exact state it was in when you bought the device. Other partitions won't be touched unless you explicitly select "full disk recovery."
• Method 2: Recover from Within Windows 8 (If You Can Still Boot Into It)
  • Open the Control Panel, navigate to "Recovery," then select either "Refresh your PC without affecting your files" or "Remove everything and reinstall Windows" (pick the latter for a full factory reset).
  • The wizard will use the recovery partition's system image to reinstall Windows 8 automatically.

Critical Note: If you've already deleted the recovery partition, you'll need to contact your device manufacturer for a factory recovery media, or use a Windows 8 installation ISO. Preloaded systems have their activation keys embedded in the BIOS, so a clean ISO install should still activate automatically—it just won't have the brand-specific preinstalled apps.

• Download an Ubuntu LTS (Long-Term Support) version (like 22.04 LTS is a solid choice for stability).
• Use the Rufus tool to write the Ubuntu ISO to a USB stick (make sure to select GPT partition table, since Windows 8 uses UEFI boot by default).
• Ensure your USB stick is at least 8GB, and back up any data on it before writing the ISO.

• After restoring Windows 8, open Disk Management: Right-click the Start menu and select "Disk Management."
• Find your main Windows partition (usually labeled C:), right-click it, and choose "Shrink Volume." Enter the amount of space you want to allocate to Ubuntu (aim for at least 20GB—more is better if you have the room).
• Once done, you'll see an "Unallocated" block of space—this is where Ubuntu will live.

• Plug in your Ubuntu USB stick, restart your PC, and press the boot menu key (usually F12, F9, or Esc) when the brand logo appears. Select the USB stick from the list to boot into Ubuntu.
• On the Ubuntu welcome screen, choose "Install Ubuntu" and follow the prompts for language, time zone, and keyboard layout.
• When you reach the "Installation Type" step, select "Something else"—this is how we set up dual-boot properly.
• In the partition screen, use the unallocated space to create two partitions:
  • A root partition: Select the unallocated space, click "+", set the size to all the unallocated space minus 4GB, choose ext4 as the file system, and set the mount point to /.
  • A swap partition: Use the remaining 4GB of unallocated space, choose swap area as the file system.
• Important: For "Device for boot loader installation," select your main hard drive (usually /dev/sda or similar—do NOT select the USB stick).
• Finish the installation, restart your PC, and you'll see the GRUB boot menu—you can now choose to boot into Windows 8 or Ubuntu.

• If your PC boots straight into Windows 8 without showing the GRUB menu, you'll need to repair the boot loader:
  • Boot back into the Ubuntu USB stick and select "Try Ubuntu."
  • Open the terminal and run these commands (replace /dev/sda5 with your Ubuntu root partition path—you can find it with sudo blkid):

    sudo blkid
    sudo mount /dev/sda5 /mnt
    sudo grub-install --boot-directory=/mnt/boot /dev/sda
    sudo update-grub
    

  • Restart your PC, and the GRUB menu should appear.

内容的提问来源于stack exchange，提问作者Mann