hi ive recently just been trying to fix my brothers laptop as it had totally failed. Ive removed the hard drive and reinstall a v ersion or wondows vista but still no boot just goes on blue screen of death and loops back. So then i found this fix cd bought it and put it onto a bootable cd but when i try use that to boot it comes up with the error: Unknown filesystem. grub rescue> Has anyone got any pointers on this please ? tried various thigs and still no luck ?