YOU VERY WRONG ITS SAYS "A class 3 machine is a UEFI system that does not support CSM. UEFI class 3 machines only run UEFI applications and do not implement CSM for backwards compatibility with legacy bootloaders."
no u wrong again " don't see why it would matter. Vista SP1 x64 should support a Class 3 system. Just use boot menu and see if the DVD has the UEFI prefix."
i have windows vista classs two iso i cant boot because the graphic driver