This issue is posted several times in similar way, but no answers seen yet. Has anybody a good idea if the mentioned Bios is able to be set to hardware excellaration?
There is no CPU BIOS, but your computer BIOS instead. All major newer CPUs have VT-X/AMD-V support. As you start your computer, press DEL, F2, F10, F12 or the correct key, which is displayed as you start it. As you navigate through the menus, you'll find the option. Just activate it (usually, it is inside the "Advanced" one) and you should be good to go.
But this seems odd to me, these technologies are for virtualization, like VirtualBox, VMWare, Xen, KVM and such, and should not be required to install the operating system itself.