VT-x is an x86 processor extension specific to Intel microprocessors, It provides hardware acceleration to common virtualized tasks.
Questions tagged [vt-x]
118 questions
166
votes
14 answers
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 started getting VT-x is not available error every…
SergeyOvchinnik
- 2,367
74
votes
9 answers
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, I get an error that VT-x is not available. Is…
Joel Martinez
- 1,257
30
votes
3 answers
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.
VT-x is disabled in the BIOS for both all CPU…
user2676140
- 2,135
- 8
- 33
- 50
22
votes
3 answers
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 and WP8; but VirtualBox says that VT-x is disabled…
StepTNT
- 452
18
votes
1 answer
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
- 547
10
votes
2 answers
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 found the setting in the BIOS, and there was a…
gen_Eric
- 294
9
votes
1 answer
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
instructions: VMPTRLD, VMPTRST, VMCLEAR, VMREAD,…
robertspierre
- 750
8
votes
4 answers
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 feature and will fail to boot without it."
If…
Ashley
- 101
8
votes
1 answer
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 came up:
However when I continued to load the live…
Aamir
- 295
7
votes
1 answer
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
Intel(R) Virtualization technologies …
Santhosh
- 759
7
votes
2 answers
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 a few boot settings (there is only 7 options in…
6
votes
2 answers
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.
The very strange thing about this is that the…
Soma Deáki
- 141
6
votes
1 answer
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 my Windows guest is running with VT-X/AMD-V…
6
votes
4 answers
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" several microseconds disabling features I don't…
Oleg Vazhnev
- 853
5
votes
2 answers
Hyper-V enable vt-x for guest in guest
Is it possible to enable vt-x for a Hyper-V guest?
I need to run a 64 bit guest inside of a 64 bit guest.
