Still can't install on physical machine.

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https://bbs.archlinux.org – I created a few VMWare virtual arch_64 machines to practice with first (with success) but when I tried to install to a Intel Atom 330 all-in-one board with wi-fi (my first post) or directly wired, certain files continue to have 'bad signatures' during the "pacstrap /mnt base base-devel" portion.I have:  1. Read the Beginner Guide about checking for UEFI and apparently it's not.  2. Tried different mirrors followed with a 'pacman -Syy' and a 'pacman -Sc' in root and in /mnt after arch-chroot -ing there  3. Tried all three partition man (HowTos)