VirtualBox 6.0 and Hyper-V

[AceHack]

Mine is not working I think they changed the API post 1809. I'm on:

00:00:02.632475 VirtualBox VM 6.0.8 r130520 win.amd64 (May 13 2019 14:14:44) release log
00:00:02.632489 Log opened 2019-05-23T04:13:57.137663100Z
00:00:02.632490 Build Type: release
00:00:02.632493 OS Product: Windows 10

I get the following error:

00:00:02.923673 VMSetError: F:\tinderbox\win-6.0\src\VBox\VMM\VMMR3\NEMR3Native-win.cpp(1299) int __cdecl nemR3NativeInit(struct VM *,bool,bool); rc=VERR_NEM_MISSING_KERNEL_API
00:00:02.923842 VMSetError: 
00:00:02.923862 NEM: NEMR3Init: Native init failed: VERR_NEM_MISSING_KERNEL_API.
00:00:02.923869 VMSetError: F:\tinderbox\win-6.0\src\VBox\VMM\VMMR3\HM.cpp(599) int __cdecl HMR3Init(struct VM *); rc=VERR_VMX_NO_VMX
00:00:02.923891 VMSetError: VT-x is not available
00:00:02.926539 ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={872da645-4a9b-1727-bee2-5585105b9eed} aComponent={ConsoleWrap} aText={ (VERR_NEM_MISSING_KERNEL_API).
00:00:02.926580 VT-x is not available (VERR_VMX_NO_VMX)}, preserve=false aResultDetail=-4009

VBox.log

VBox.log

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[socratis]

@AceHack

00:00:02.632493 OS Release: 10.0.18898

That's an Insider build. You're in the wrong area, there's a specific Windows pre-releases area, where I'm going to move both our posts and split them from the similar thread in the Windows Hosts area.

00:00:02.852316 HM: HMR3Init: Attempting fall back to NEM: VT-x is not available
00:00:02.922355 NEM: WHvCapabilityCodeHypervisorPresent is TRUE, so this might work...

It seems that you have Hyper-V enabled, it checks out.

00:00:02.923862 NEM: NEMR3Init: Native init failed: VERR_NEM_MISSING_KERNEL_API.

That seems very similar to the message that the pre-1809 builds were seeing. That in my mind means that whatever VirtualBox is looking for, is not there.