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I am a new to virtual box environment. I installed virtualbox-4.2 in Ubuntu 12.04 32 bit system. Now i am trying to import a 64 bit operating system. I got the following error.

Failed to open a session for the virtual machine localvm.
VT-x is not available. (VERR_VMX_NO_VMX).


Result Code: 
NS_ERROR_FAILURE (0x80004005)
Component: 
Console
Interface: 
IConsole {db7ab4ca-2a3f-4183-9243-c1208da92392}

I tried to make my question clear but if its not clear any edits are welcome and help me to come out from this.... thank YOu

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  • The error pretty much explains the issue -- VT-x is not available.
    – David Schwartz
    Oct 1, 2012 at 10:29
  • Can you explain what can be done to resolve this error
    – DomincJune
    Oct 1, 2012 at 10:31
  • Troubleshoot to figure out what's causing it and fix whatever the cause is. Does the CPU support VT-x? Is it enabled in the BIOS? ...
    – David Schwartz
    Oct 1, 2012 at 10:56

2 Answers 2

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In order to run 64-bit virtual machines on a 32-bit platform, you need hardware virtualization support. It is called VT-x for Intel processors, and AMD-V for AMD. It seems it isn't available on your system. Check the BIOS, it may have been turned off, or check if your processor indeed supports hardware virtualization.

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  • ..and check the VM settings in virtualbox, if it's enabled for that virtual machine (should be by default i think).
    – mulaz
    Oct 1, 2012 at 10:25
  • I checked the Bios information its is as follows ....BIOS is upgradeable
    – DomincJune
    Oct 1, 2012 at 10:30
  • It doesn't matter whether the BIOS can be upgraded or not. Look for "VT-x" or "AMD-V" in the BIOS settings. If you can't find them, then most probably your processor doesn't support HW virtualization.
    – Lacek
    Oct 1, 2012 at 10:32
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you can try this command: egrep -i "vmx|svm" /proc/cpuinfo to verify the presence of virtualization extensions. You should also check your VMs settings under VM settings -> System -> Acceleration and check the first box.

In order to run a 64-bit guest on a 32-bit OS you are still required to have a 64-bit CPU with VMX/SVM. See VirtualBox manual

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  • Hi there, I tried to egrep -i "vmx|svm" /proc/cpuinfo i didnt get any output....
    – DomincJune
    Oct 1, 2012 at 10:47
  • I also checked the VM settings but my Accleration is not activated.
    – DomincJune
    Oct 1, 2012 at 10:51
  • No output indicates that your CPU doesn't support any virtualization features, but according to the vbox manual (link in post above) these features are required in order to run 64-bit guests. So I would say you have to replace your CPU.
    – olvrlrnz
    Oct 7, 2012 at 21:54

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