GRUB issues with new Windows Partition

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https://bbs.archlinux.org – Yes, I noticed that error, but inspecting the 40_custom file shows no change from the default.I ran the "grub-mkconfig" command, then pasted the section below into the /boot/grub/grub.cfg file.  It seems to have generated the correct UUID.  Now, in the GRUB boot menu when I select Windows entry it goes to a continuous blinking cursor and doesn't boot.### BEGIN /etc/grub.d/30_os-prober ###  /dev/cdrom: open failed: No medium found  No volume groups foundFound Windows 8 (loader) on /dev/sda1menuentry 'Windows 8 (loader) (on /dev/sda1)' --class windows (HowTos)