I have successfully run Ubuntu on my computer with an older version of VBox in Windows 7.

I updated VBox, and downloaded and imported a Kali Linux 2017 i686 .ovf file. But then I got an error after which I installed the extension pack. Now I'm getting a different VT-x error.

If it helps, the Acceleration reads : PAE/NX, KVM paravirtualization. The acceleration tab in settings is disabled.

Failed to open a session for the virtual machine Kali-Linux-2017.1-vbox-i686.

VT-x is not available (VERR_VMX_NO_VMX).

Result Code: E_FAIL (0x80004005) Component: ConsoleWrap Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed}

  • What error? Paste the exact error message here. – Larssend May 25 '17 at 9:07
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    Do you use Hyper-V in Windows too? druss.co/2015/06/… suggests it might be a cause of the error... – Kinnectus May 25 '17 at 13:37
  • @BigChris Will enabling Hyper-V and/or Virtualization affect my computer in any other way? No negatives right? – ProgramSpree May 25 '17 at 14:01
  • Hyper-V is Microsoft's virtual machine technology but it's a built-in feature that needs to be enabled and would need your VT-x enabling in BIOS etc. before you could use it properly. The reason I ask is that an online resource seems to suggest it may cause the error you're experiencing - along with whether you've actually enabled VT-x in your BIOS :) – Kinnectus May 25 '17 at 14:07
  • I downloaded Speccy and found out that my system does not support virtualization. Thanks for all your help, though! – ProgramSpree May 28 '17 at 3:15

I would follow: https://stackoverflow.com/questions/5482223/vt-x-is-not-available-when-i-start-my-virtual-machine

That error is more pointing to that your computers bios doesn't have virtualization enabled. That option isn't available on all CPU's.

Take a look into bios and verify that virtualization is enabled, if you can't find the option, verify that your CPU has the ability.

Most follow a VT- enable/disabled option, generally under CPU settings in bios.

  • But the OP states at the start he could run Ubuntu before he upgraded VBox... might have been prudent to ask if the user has enabled VT-x rather than assuming it's off... – Kinnectus May 25 '17 at 13:54
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    @BigChris He did say that, but most of the time it's disabled. Maybe a firmware or update he did installed disabled it. The only other option I see is that he has Hyper V enabled, and according to druss.co/2015/06/… can cause same warning. – JustAGrump May 25 '17 at 14:00
  • Lol which I've already asked the OP under the question :) – Kinnectus May 25 '17 at 14:05

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