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[title] Flash the bootloader
[* icon_note] The bootloader is a chunk of code on the printer's microcontroller that allows for firmware upgrades over USB.
[* icon_note] Creality neglected to install a bootloader when they built the original CR-10. You will need to install the bootloader yourself in order to upload new firmware to the printer
[* icon_caution] The CR-10S (the new version of the CR-10) already has a bootloader installed. If you have a CR-10S then you can skip this step.
[* icon_caution] Flashing the bootloader requires a special tool capable of programming AVR chips.
[* black] Follow our separate guide for [guide|62|flashing the bootloader on your printer].

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