- VirtualBox or Oracle VM Virtual Box is a tool that allows developers to create and manage multiple virtual machines on one powerful computer.
- Some developers have complained about a failure when creating a virtual session, accompanied by the “VERR_VMX_NO_Vt-x” error message.
When attempting to activate the Virtualization Technology feature in BIOS settings, you will receive an error stating “VTx is not available.”. After restarting the computer, open the Command Prompt as Administrator.
In this post, MiniTool will show you the solution to the error such as verr_vmx_no_vmx, vt-x is not available (verr_vmx_no_vmx).
This can be eliminated if VT-x hasn’t been manually disabled in the BIOS for some time. If you’re running Windows 11 or 10, there’s no reason someone would disable the VT-x technology in the BIOS. Please see our guide for how to enable VT-x in case it has been changed for some reason.
Developers can create and manage multiple virtual machines on a powerful computer using VirtualBox or Oracle VM Virtual Box. Recently, however, some developers have complained that creating virtual sessions was failing with the error message “VT-x not available (VERR_VMX_NO_VMX)”.
My computer was not compatible with 64 bit mode, so when I attempted to load the win7 iso that matched my installed version, I received the error message:”attempting to load a 64 bit application, however this CPU is not supported by the 64 bit mode”.
The steps below will guide you in resolving this error message quickly if you are seeing it on your system as well.
What causes VT-x to be unavailable (VERR_VMX_NO_VMX)?
- There is a memory activation in the main memory.
- The BIOS settings do not enable Vt-X.
- It is possible to virtualize Windows using Hyper-V.
- It is not possible to run VRX on this computer due to the processor’s limitations.
How to solve the ‘VT-x not available (VERR_VMX_NO_VMX)’ problem?
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Updated: April 2024
In order to fix some VT-X is not available errors in VirtualBox due to Windows updates, go back to the same location and disable all Hyper-V functions before restarting.
Enable VT-X in the BIOS settings
- Select Update and Security by pressing Windows + I.
- Under Advanced Startup, click Restart Now on the Recovery tab.
- A Windows recovery environment will appear after Windows has restarted.
- You can find Advanced Settings under Troubleshooting in the pop-up window.
- UEFI Firmware Settings can be accessed from Advanced Windows Settings.
- Select System Security from the Security tab in the BIOS.
- Turn on virtualization and VTX/VTD technology, if not already enabled.
Uninstalling third-party antivirus software
- Windows Settings can be accessed by pressing Windows + I.
- Tap “Applications” in Settings.
- Find your antivirus program in the list of installed applications and select it.
- Then click Uninstall.
- Upon clicking Yes, your actions will be confirmed in a window.
- Make sure your computer is restarted after removing the antivirus program.
Disable kernel isolation in Windows Defender
- The first step is to search for Windows Defender in the Windows search box.
- The search results will list Windows Defender Security Center. Select it.
- Click the Device Security tab in Windows Defender Security Center.
- Under Kernel Isolation, click Details.
- When you have finished disabling the Memory Integrity option, you can move on.
- Your computer should be rebooted last.
RECOMMENATION: Click here for help with Windows errors.
Frequently Asked Questions
How do I enable VMX in Windows 10?
- Press the Windows key to bring up a search box.
- Type "Turn Windows features on or off" and click on it to open it.
- Scroll down and check the box next to Hyper-V.
- Click OK.
- Windows will install the necessary files to enable virtualization.
- You will then be prompted to reboot your computer.
What does “Vt-X not available” mean?
Try reducing the RAM to about 3175 MB and the cores to 1 in the settings. This should work if your BIOS is set to virtualize. Use f12, Security, Virtualization to make sure it's on. If it's not VT-x, that's fine, it should be VT-d or something similar.
How do I enable VT-X in the BIOS?
Press the F2 key when you start the BIOS setup. Press the right arrow key to go to the Advanced tab, Select Virtualization Technology, and press Enter. Select Enabled and press Enter. Press F10, select Yes and press Enter to save your changes and restart Windows.
A error occurred while VT-X was trying to start (VERR_VMX_NO_VMX).Result code: E_FAIL (0x80004005)Component: ConsoleWrapInterface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed}
It is already possible to create an end-to-end Hyper-V nested virtualization setup on a Windows 10 Hyper-V host that does not have the Default Switch.
VT-x errors on Windows 10 are most commonly caused by Hyper-V virtualization, which interferes with VirtualBox. You can disable Hyper-V through the command line to fix that.
Mark Ginter is a tech blogger with a passion for all things gadgets and gizmos. A self-proclaimed "geek", Mark has been blogging about technology for over 15 years. His blog, techquack.com, covers a wide range of topics including new product releases, industry news, and tips and tricks for getting the most out of your devices. If you're looking for someone who can keep you up-to-date with all the latest tech news and developments, then be sure to follow him over at Microsoft.
