rico.tiko Posted October 18, 2021 Share Posted October 18, 2021 Hello everyone! I installed VirtualBox on a Windows machine, but it doesn't work. I get the following error VT-x is not available (VER_VMX_NO_VMX). E_FAIL (0x80004005). I think that maybe it is because of the Hyper-V I have deployed. However, it wasn't running when I tried to start the VirtualBox VM. What is wrong? Any ideas? Link to comment Share on other sites More sharing options...
Official Moderator Posted October 19, 2021 Share Posted October 19, 2021 Hi, @rico.tiko! What is probably causing an error is precisely the fact that you have Hyper-V installed. In your case, VirtualBox is a Type 2 hypervisor, while Hyper-V is a type 1. The main difference is that a type 2 hypervisor is deployed on the OS which is running on your hardware. At the same time, a Type 1 hypervisor is deployed directly on the hardware. And this is where the problem occurs. All of the hypervisors need processor virtualization extensions. It is a set of instructions set for the hardware virtualization (AMD-V. or Intel VT-x). Hyper-V takes complete control of the extensions, making them not available for the VirtualBox because only one software component is able to use Intel VT-x or AMD-V at the same time. Now let's see how to make them work together. You have several methods to deal with the incompatibility issues: 1. You can uninstall Hyper-V in the GUI. 2. Alternatively, you could utilize PowerShell to disable the Hyper-V feature. 3. There is one more method using PowerShell. You can uninstall the Hyper-V role with dism.exe 4. Another way to disable Hyper-V is by using BCDedit. 5. You can disable Device Guard and Credential Guard. Note: VirtualBox can function with Hyper-V, Device and Credential Guard, only from VirtualBox 6.0. Check the detailed guide on how to work with every method in this blog post https://www.nakivo.com/blog/virtualization-applications-with-hyper-v-device-guard-and-credential-guard/ Link to comment Share on other sites More sharing options...
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