[GRUB] GRUB re-install error

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http://www.kubuntuforums.net – I am trying to re-install GRUB, so my system will dual boot either Windows 8 or Kubuntu 12.04. I have rEFInd to override Windows and let me choose Kubuntu to boot up. I would prefer GRUB handle my bootup options. What does this error mean? ron@ron-Lenovo-H430:~$ grub-install /dev/sda /usr/sbin/grub-probe: error: cannot find a GRUB drive for /dev/sda2. Check your device.map. /boot/efi doesn't look like an EFI partition. rm: cannot remove `/boot/grub/acpi.mod': Permission denied (HowTos)