Hi there & welcome.
I don't have your system, but just for starters are you using a 64 or 32 bit dvd to install this as you will need the 64 bit for your system, the reason I am asking this is I purchased a dvd for my win7 64 bit & I was given a 32 bit by mistake, didn't know this until I tried installing, as my old system was a 64 bit Vista.
You should be able to turn on/off EFI at the bios.
Also what drive are you using to install the OS, Blu ray or DVD?
As sometimes the BR can conflict with win installs.
Do you know how to get into bios on your system?
Hope this helps, if not I am sure there are others here who will guide you more.
Ben