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I burned a live session of Linux Mint 17 Cinnamon to a USB stick. Then I installed LM17C into an external hard drive by using this USB stick. I managed to do it and even successfully started on my computer.
However I have tried to boot it on another computer, yet it did not started and gave the error below:
error: file '/boot/grub/i386-pc/normal.mod' not found. entering rescue mode... grub rescue >
My computer has an Intel processor, but the second PC has AMD. I think this is the problem. I do not know how to solve it, though.