Then you will need to [https://wiki.archlinux.org/index.php/Change_Root chroot] as described [[Special:MyLanguage/Restore_the_GRUB_Bootloader#Identify_and_Prepare_the_Installed_Partition.28s.29|here]], and then perform Step 5 again.
Then you will need to chroot as described here, and then perform Step 5 again.