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http://forums.fedoraforum.org – I installed fedora 12 as second os along with ulimtate vista on 64 bit machine. i was able finish the install and boot to fedora first time. but after updating the software , i am unable to boot into fedora but am able to boot in to vista. I am using a HP Pavilion HDX9000 notebook series. it has 2 100gb hdd. vista is on c and fedora is on d. boot info was written to MBR on C drive. (HowTos)