Folks,
I was bit by this today, turning my dual-bootable laptop into a brick.
I tried a lot of things here and nothing worked.
What did work for me was following directions in 
http://community.linuxmint.com/tutorial/view/245
I'm running Linux Mint 17 Qiana, which is based on Ubuntu 14.04
I was upgrading from Mint 16 to Mint 17 and the install appeared to work fine.

For me, the following worked:

             mount /dev/sda5 /mnt
             grub-install  --root-directory=/mnt/  /dev/sda
             reboot

which is close to some suggestions others made but those didn't work for me.
Obviously you'd need to change the sda5 to whatever is appropriate for you.
No, I have not made a typo above.  There is no trailing number on the sda for 
the grub-install command.

The above for me worked, despite the error message:
          "grub-probe: error: failed to get canonical path of /cow."
Hope this helps.

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https://bugs.launchpad.net/bugs/1289977

Title:
  Ubuntu 14.04 Update breaks grub, resulting in "error: symbol
  'grub_term_highlight_color' not found"

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