[ubuntu] Problems installing ubuntu 13 among win8 (paypal money for your help)

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http://ubuntuforums.org – hi, I have done several times this procedure installing ubuntu in already existing windows, however, now seems impossible to get it done, I've read many tutorials, applied some changes in grub.cfg and others tutorials, including supergrub2 and its brother, but still wrong. Historic: - Brand-new Lenovo Y500 with win8, then installed correctly using this tutorial: http://askubuntu.com/questions/27257...on-lenovo-y500 - when restart, in grub splash screen only works ubuntu and runs correctly, others give error - installed and executed "boot-repair", now gives different errors and on (Hardware)