Failed to open a session for the virtual machine Linux.

[rkb]

I am trying to start a VM and I am getting the error:

Failed to open a session for the virtual machine Linux.

VT-x is not available (VERR_VMX_NO_VMX).

Result Code: E_FAIL (0x80004005)
Component: ConsoleWrap
Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed}

Now I have read on other similar posts that you need to boot into the BIOS to enable VT-x and booting into the BIOS is a manufacture specific process. I have a Dell and if I press F12 during the boot process I get the BIOS settings but I cannot find anything about virtualization or VT-x. Anyone else have a Dell that has a similar problem? This VM used to start just fine but the "upgrade" to Windows 10 seems to have broken it. How do I get it back? Does VirtualBox support a Windows 10 host? Should I rebuild my VM? Any other ideas?

Thank you.

Kevin

[andyp73]

If the VM used to work before upgrading to Windows 10 then one could (and probably should) assume that the upgrade has broken something rather than a BIOS setting mysteriously having changed.

Check your Windows 10 installation to see if Hyper-V is installed and running as it will prevent VirtualBox from working correctly. Failing that a guest log file might be of help.

Andy.

[rkb]

I notice in the services that there are a bunch of Hyper-V services available but as far as I can see they are not running.

[andyp73]

From this thread you can check by running:

bcdedit /enum

in an administrative command prompt and checking the hypervisorlaunchtype value

Andy.