[solved] Installation caused some other virtual machines failed to start

Docker Desktop for Windows
1

Use of Hyper-V cause my fedora VM in VirtualBox fail to start with error:

Failed to open a session for the virtual machine fedora-lxde.VT-x is not available (VERR_VMX_NO_VMX).Result Code: E_FAIL (0x80004005)Component: ConsoleWrapInterface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed}

2

To fix this I had to disable Hyper-V virtualization and now my Virtualbox VM is working, but Docker is not (requires Hyper-V)

Steps to disable Hyper-V:

  • Open Control Panel
  • Go to Program section -> Turn Windows features on or off
  • Disable Hyper-V
  • Reboot computer
3

VirtualBox and Hyper-V cannot be active at the same time. This is unfortunate, but a known limitation: https://beta.docker.com/docs/windows/getting-started/#what-to-know-before-you-install

4

what if my virtual machine windows 10 20H2 build is running on vSphere hypervisor.
So does it have the same limitation?