1. Does your Bios have an option to boot from USB?
Yes all 3 PCs I'v tried on do
2. Do you have other Linux distro installed on HD?
If yest connect sparky to USB, run Linux distro from HD, refresh grub:
sudo update-grubThen reboot.
No other linux, win7 on all machines
3. What installer have you used to install sparky on USB?
The live-installer from the desktop? or the old one?
I burned ISO to CD booted that up and installed from the desktop installer to usb.
4. Does you machine have Bios or UEFI?
All Bios. Ive got Tails running on another stick boots no problem on all machines, also have yet another stick with live versions of sparky and 5 other distros to multiboot from for testing to see what I wanted a full install of, chose sparky :-)
EDIT: Just tried to boot from an offce CAD machine lol, got this msg:
error: file '/grub/i386-pc/normal.mod' not found.