hi everyone

i'm looking a solution for my Sony vaio pro 13, i want to install win 7 pro, this laptop have win 8.1 single language. I don't want loose the recovery partitions etc.

So i do some things for install:

Rufus with gpt compatibility
add usb 3.0 drivers with the dism commands... etc

after many hours of learn and read i get the "install win 7 screen" but it's freeze on the "starting windows screen"

bios UEFI/secure boot disable/external drives first, etc

and i can't boot from the sd card... (but with the intel usb 3.0 drivers should be okay)

sorry my english, searching in forums there's many people with the "freeze problem"

any ideas or not possibility to install win7 and win 8 dual?