Boot up with Arch Live CD
# loadkeys uk # setfont Lat2-Terminus16 # vgscan vgchange -ay cryptsetup luksOpen /dev/mapper/[encrypted source][unencrypted target] mount /dev/mapper/[unencrypted target]/mnt mount /dev/mapper/[lvm boot device]/mnt/boot arch-chroot /mnt /bin/bash grub-install --target=i386-pc --recheck /dev/sdX exit umount /mnt/boot umount /mnt reboot
Boot back in to Arch without Live CD and as root
## It may be sufficient to execute the following commands in the previous chroot environment.
# cp /boot/grub/grub.cfg /boot/grub/grub.cfg.old grub-mkconfig -o /boot/grub/grub.cfg rebootRequires GRUB2 OS-Prober to detect Windows installation(s).
Enjoy!
References
https://wiki.archlinux.org/index.php/Beginners'_Guide
https://wiki.archlinux.org/index.php/LVM
https://wiki.archlinux.org/index.php/Dm-crypt_with_LUKS
https://wiki.archlinux.org/index.php/GRUB2