I am have a fully updated Arch Linux system that was running fine. Last night I tried to setup autofs per instructions on the Arch wiki, but upon restart there was no boot menu and only a GRUB error message saying "Error 15".

(1) Using Ext2explore in Windows, I can see the following partition structure:

(2) Using fdisk in an ArchLinux live cd, I can see this:

(3) I tried to do "fdisk /dev/sda/" then the commands x, f, w to correct error, but fdisk says my partitions' "ordering is correct already"

(4) Using the root and setup commands in the GRUB shell also ended in failure (it tells me it can't find GRUB files, /boot/grub/, etc. etc.). Specifically, I tried "root (hd0,1)", then "setup (hd0)", (also hd0,0, hd0,2, etc.), all failed.

Is there any hope of restoring my system? Thanks for your help.