Na superuser.com jsem nasel tuhle odpoved:
64 bit teda masIf VirtualBox is only showing 32 bit versions in the Version list make sure:
Your Host OS is 64-bits
Intel Virtualization Technology and VT-d are both enabled in the BIOS
The Hyper-V platform is disabled in your Windows Feature list.
tak zkontroluj ten BIOS, jestli je ta virtualizace povolena
to zakazany hyper-v nevim co to je, snad nekdo jiny poradi?