Lubuntu installation failed at installing bootloader

I see a boot entry for Windows, but I don’t see, where it could be installed? Did you modify the output of parted --list or is it only an old entry?

We can try to manually install the bootloader. Start again the installation medium, open a terminal and execute line by line:

sudo -s

mount /dev/sda2 /mnt

mount /dev/sda1 /mnt/boot/efi

for i in dev dev/pts proc sys sys/firmware; do mount --bind /$i /mnt/$i; done

chroot /mnt

update-grub

grub-install

exit

exit

Please post the complete input and output, so that we can help in case of errors.

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