Hello. I have Asus X550CC with modified BIOS (SLIC 2.1) from this forum. I need install Win 7 on this. But BIOS in it don't run in Legacy mode and in UEFI mode don't boot from USB and from DVD. I need set BIOS on legacy. Previously OS is Win 10. I'm formated HDD on MBR mode. Any solution on this? Thank you.