Nokia — Software Recovery Tool 6.2.55 !link!

: At least 2GB–4GB of free disk space for firmware downloads.

Do not close the laptop lid. The progress bar will reach 100% and show "Success." Nokia Software Recovery Tool 6.2.55

Ensure your Nokia Lumia has at least 50% battery life. If the phone dies during the flashing process, you risk corrupting the bootloader, which can render the device unrecoverable. Even if the phone won't boot to the OS to check the percentage, usually, the charging icon will appear when plugged into a wall charger. Let it charge for 30 minutes before starting the recovery process. : At least 2GB–4GB of free disk space