Why Virtual Box won't give me option to create 64 bits guests?

Posted by Eduardo Born on Super User See other posts from Super User or by Eduardo Born
Published on 2013-10-31T18:57:24Z Indexed on 2014/05/30 9:31 UTC
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My host is x64 bits Windows 8.1.

I downloaded the latest Virtual Box (4.3) and I'm trying to create a VM with a 64 bits Ubuntu OS (ubuntu-12.04.3-desktop-amd64).

When I go to New VM wizard, it doesn't give me option to select "Ubuntu (x64)" as I have seen in other people's screenshots, only just "Ubuntu". As a result, the ISO can't boot. I tried in another PC and Virtual Box gives the x64 variants to most listed OS...

Control Panel shows x64 OS, x64 processor. My host laptop is a Sony Vaio VPCZ22UGX/N, Intel® Core™ i7-2640M processor. CPUz shows Vx-t is available on my processor, of course.

Here is what I tried so far:

  • I enabled IO APIC as required in the docs.

  • I have virtualization enabled in the BIOS. It works fine in VMware.

  • Check that Hyper-V is not running or even installed on my Windows. Same for VMware.

  • I also tried running the command:

    VBoxManage modifyvm [vmname] --longmode on

for that VM, but no change.. I think the issue is really that I can't select x64 variant of the Ubuntu OS for that VM. Other people seem to indicate that's a requirement, but I don't get that option for some reason.

I spent a lot of time and can't find what's wrong... Anyone knows what could be missing here?

Thank you very much!!

Eduardo

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