I've been trying to install Ubuntu 12.04 64 bit on a Samsung Series 7 (700Z5C-S01US), dual boot with Windows 7 and bricked two laptops. On the first one, I accidentally installed the 32 bit version (which was working great), then decided to reinstall the 64 bit version. While in Windows, I shrank the largest partition to give myself about 600 GB of unallocated space to install Ubuntu. I also deleted the laptop's 8GB ExpressCache partition (iSSD on the motherboard) so I could create swap space in Ubuntu. (Again, the 32 bit version worked fine with this setup.) I downloaded the 64 bit iso file, and used Pendrive to create a bootable USB stick. I changed the boot order in the BIOS setup to start with the USB and had UEFI enabled.
I'm not sure what options I have. Return the laptop and get another brand? It doesn't seem like there is a solution to this yet.