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Questions tagged [vt-x]

VT-x is an x86 processor extension specific to Intel microprocessors, It provides hardware acceleration to common virtualized tasks.

167 votes
14 answers
445k views

VT-x is not available, but is enabled in BIOS

Recently I started having an issue with VT-x on my Windows 10 running on HP EliteBook. I was using Oracle VirtualBox to run some VMs on it before and VT-x was enabled in BIOS and was working fine. I ...
SergeyOvchinnik's user avatar
74 votes
9 answers
379k views

How do I enable VT-X?

I'd like to provide a guest OS with multiple CPUs in VirtualBox. My host machine is a quad core HP Compaq and uses the Intel Core 2 vPro hardware. However, when I try to enable the setting in vbox, ...
Joel Martinez's user avatar
30 votes
3 answers
138k views

VT-x error when setting up VirtualBox on Ubuntu

I have tried to setup VirtualBox on Ubuntu, but I get this error even though Intel virtualization technology (VT-x) is set to Yes in the BIOS: Failed to open a session for the virtual machine Ubuntu....
user2676140's user avatar
  • 2,095
22 votes
3 answers
15k views

Intel VT-x disappeared after upgrading to Windows 8

I've upgraded to Windows 8 some weeks ago (MSDNAA!) and today, while I was trying to run a VM, I've noticed that VT-x is disabled. Now, Hyper-V works without problems, as I've tried emulating Win7 ...
StepTNT's user avatar
  • 452
18 votes
1 answer
214k views

What is the EFI shell?

My BIOS offers me the option to launch an EFI shell, but I have no idea what that is. Does it allow me to turn on CPU flags like VT-x or something similar? Why would I want to use it?
Flame_Phoenix's user avatar
10 votes
2 answers
28k views

Why does HP recommend that I keep Hardware Virtualization off?

I have an HP desktop, and I wanted to install VirtualBox, so I could run an XP VM (gotta test stuff in IE8). Before setting this up, I went into my BIOS to check if Hardware Virtualization was on. I ...
gen_Eric's user avatar
  • 284
9 votes
1 answer
11k views

Is there a technical reason for Intel VT-x being disabled by default on some motherboards?

Intel VT-x is an instruction set that facilitates virtualization. From Wikipedia The CPU flag for VT-x capability is "vmx" [...] "vmx" stands for Virtual Machine Extensions, which adds ten new ...
robertspierre's user avatar
8 votes
4 answers
16k views

Error "VT-x/AMD-V hardware acceleration not available on your system" while trying to run Virtualbox

I have to run Mac OS on virtual box for a class and it keeps giving me errors stating "VT-x/AMD-V hardware acceleration not available on your system. Certain guests (e.g. OS/2 and QNX) require this ...
Ashley's user avatar
  • 101
8 votes
1 answer
7k views

Unable to boot Ubuntu 64-bit in Virtualbox on Mac OS X

I have latest generation Macbook Pro 7.1 (Intel Core 2 Duo) running Mac OS X 10.6.6. I installed Virtuabox 4.0.2 and tried to boot Ubuntu 10.10 64-bit iso. The boot options screen from the live CD ...
Aamir's user avatar
  • 295
7 votes
1 answer
42k views

How to run virtual machine when my processor does not support virtualization?

I am using Windows XP 32-bit and have an Intel Pentium M 725 processor. I used a software tool from Intel to check whether virtualization is allowed: Supporting advaced Intel processor technologies ...
Santhosh's user avatar
  • 709
7 votes
2 answers
18k views

VT-X option not available in BIOS even if Intel Core supports VT-X

Im trying to speed up an android emulator using VT-X but there is no VT-X options in my BIOS. Even worse, my BIOS is almost empty! There is only the change password, which way to boot, information and ...
Snipe_and_Swipe's user avatar
6 votes
2 answers
15k views

Intel Virtualization Technology and VT-X won't work in Windows 8.1

I am trying to run an x86 Android Virtual Device using Intel Virtualization Technology and VT-X. These features are required for the emulator to run correctly. However, I can't seem to get it to work. ...
Soma Deáki's user avatar
6 votes
4 answers
2k views

does it make sense to disable processor technologies I don't use? (virtualization etc)

In my server bios I've found such technologies: Intel Virtualization Technology Intel VT-d I don't use them as I don't use virtualization. I'm using server for HFT trading and so I want to "win" ...
Oleg Vazhnev's user avatar
6 votes
1 answer
9k views

Installing Intel HAXM inside VirtualBox

I'm trying to install Intel Hardware Acceleration Execution Manager in a Windows 7 guest using VirtualBox. When I run intelhaxm.exe to install it, I get the following error: This isn't true, because ...
Matías Fidemraizer's user avatar
5 votes
1 answer
940 views

Does VT-x really need bios support?

I have an old laptop with Core Duo (not Core 2). The CPU supports VT-x but the bios doesn't. (And never, no more BIOS update) Does VT-x really need BIOS support? Can we do it with a Linux kernel ...
Tatsuyuki Ishi's user avatar

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