Windows 8 and VirtualBox - I do not see the 64-bit systems

[Anonimo]

Hello to all,
I installed the latest version of VirtualBox in Windows 8.
I realized early on that while the wizard to create a new virtual machine, you do not see the option to select a 64-bit operating systems.

I am 100% sure that the same PC, which was previously installed Windows 7 in VirtualBox you could see (and you could install / use), even the 64-bit systems!

I checked the BIOS and virtualization is active, so I tried to turn it off and on again, but it does not work.
I also updated the BIOS, but to no avail ....

At this point I doubt / hope that there is some check to be activated in Windows 8.

Can you help?

Thanks in advance.

[Perryg]

Does your Windows 8 have Hyper-v?

[Anonimo]

Yes, I have already installed Hyper-V on Windows 8.
But I prefer to use VirtualBox

Why have you made ​​this question?

[Perryg]

Because Hyper-v is another virtualizer and you can't run two at the same time (for 64-bit guests). Now here's the rub, Microsoft decided to have it loaded at boot. Since only one application can use hardware virtualization at a time you need to disable that or remove it if you want to use VirtualBox and 64-bit guests.

[BillG]

Now here's the rub, Microsoft decided to have it loaded at boot.

They didn't really have any other option. The host runs as a vm under the hypervisor, so the hypervisor has to load before the host OS.

[Anonimo]

Because Hyper-v is another virtualizer and you can't run two at the same time (for 64-bit guests). Now here's the rub, Microsoft decided to have it loaded at boot. Since only one application can use hardware virtualization at a time you need to disable that or remove it if you want to use VirtualBox and 64-bit guests.

Perfect! Thank you!
I knew they were incompatible but I thought it was enough, do not run Hyper-V in order to avoid problems.
Now I have permanently removed Hyper-V and VirtualBox is working properly.

PS. I know that there is a portable version of VirtualBox unofficial, it is very very convenient, but that is not official worries me a little ...
According to you, sooner or later will be made ​​an official version of VirtualBox Portable?

[FiSa]

Hi, I had the same problem, but I didn't install the Hyper V. Why I can run a VM with 64 system?

[BillG]

Do your CPU and motherboard support hardware virtualization? Is it enabled in the BIOS?