A common but overlooked cause is having no space left on the EFI device , which prevents efibootmgr from creating a new entry.
Enter your BIOS/UEFI settings and ensure Secure Boot is Disabled . bootload error id 1
Use a high-quality USB data cable and try a different USB port on your PC. A common but overlooked cause is having no
On platforms like (Uno, Nano, Mega), error code 1 during upload usually means: On platforms like (Uno, Nano, Mega), error code
Power off and unplug the system. Remove the affected controller card (if removable). Inspect:
If the installer fails at the end, you can often fix it via a Live USB using these terminal commands: sudo mount /dev/sdXn /mnt (mount your root partition)
If you recently used a partition manager (like GParted or Disk Management) to resize, move, or delete partitions, you may have changed the "UUID" (Universally Unique Identifier) or the index number of the boot partition. The bootloader is still looking for the old ID/number, resulting in an error.