How to repair GRUB after Win8 install?

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http://chakra-project.org – Hi,Windows is a destructor. And I don't laugh. It destroy your MBR, that's why GRUB isn't usable now.That's some personal recommendation : Install Windows before everythingIf I don't say rubbish you can simply repair your GRUB but before you need to boot on you inaccessible partition with a chroot to execute some command :Chroot part :_ Boot on a live media with the same architecture than your Chakra can't works with different architecture_ Then, open konsole and type sudo fdisk -l to list everything in your hard drive. If you've one disk you'll see some (HowTos)