I've done it already with no success. Both with UEFI and Secure Boot ON and OFF, and Legacy with ON and OFF.
NO LUCK! :)
I communicated with Dell customer service, they recommended me to flash the latest BIOS if any help, but it didn't.
Last solution was to remove the pre-installed HD, set temporarily the SSHD as 1st Drive (Drive 0), install Windows 7. Once I finish installing, I'll change places the drives and alter the boot manually each time I want to boot to Windows 7.
This is my solution so far.
