i had the same issue i got the same laptop as you.
i had to go in to bios and disable fast boot and enable the other thing that pops up when u disable that. then i dissabled secure boot.
after that i installed a new win7 ( i dont like win8 that comes along) and i wiped the entire disk doing that including backup partitions.
after that i installed bt from a live boot usb.
had some problems even after installing blacktrack cause it still did not want to give me the option to boot between different os so i downloaded a boot repair disk and made it a bootable usb.
selected the automatic repair. after that it worked.
now im trying to get the wireless card working and mabye some better drivers for the touchpad too. mabye need to do something more too but havent had time to check just yet. finnihed the install like 30 minutes ago