I have HP ProBook 450 G1 Laptop with Windows 7 Professional. It has an Intel Core i7 CPU which is claimed to have Virtualization Technology. But I can't find it in BIOS to enable.

Now I installed Oracle Virtual Box (VirtualBox-4.1.4-74291-Win) and created a VM with 64-bit Linux. When I try to start it and get the following error:

VT-x/AMD-V hardware acceleration has been enabled, but is not operational. Your 64-bit guest will fail to detect a 64-bit CPU and will not be able to boot.

Please ensure that you have enabled VT-x/AMD-V properly in the BIOS of your host computer.

Does anyone have getting around way to fix it?


think the BIOS is still the way to go, try this:

On boot press F10 to enter Bios.

Go to: System configuration -> Device configurations

find there Virtualization technology and choose enabled. Press 'Enter' key to Save it.

Go to: File - > Save Changes and Exit and choose Yes.

found this here


See: https://www.virtualbox.org/manual/ch03.html

See if you can find it in your bios here:

Advanced mode->Advanced tab->CPU Configuration-> Intel Virtualization Technology

VirtualBox supports 64-bit guest operating systems, even on 32-bit host operating systems, provided that the following conditions are met:

  1. You need a 64-bit processor with hardware virtualization support (see Section 10.3, “Hardware vs. software virtualization”).

  2. You must enable hardware virtualization for the particular VM for which you want 64-bit support; software virtualization is not supported for 64-bit VMs.

  3. If you want to use 64-bit guest support on a 32-bit host operating system, you must also select a 64-bit operating system for the particular VM. Since supporting 64 bits on 32-bit hosts incurs additional overhead, VirtualBox only enables this support upon explicit request.

On 64-bit hosts (which typically come with hardware virtualization support), 64-bit guest operating systems are always supported regardless of settings, so you can simply install a 64-bit operating system in the guest.

Warning On any host, you should enable the I/O APIC for virtual machines that you intend to use in 64-bit mode. This is especially true for 64-bit Windows VMs. See Section 3.3.2, “"Advanced" tab”. In addition, for 64-bit Windows guests, you should make sure that the VM uses the Intel networking device, since there is no 64-bit driver support for the AMD PCNet card; see Section 6.1, “Virtual networking hardware”.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.