Have you just updated to 6.0.12 from a previous version or is this the first install of VirtualBox on the host. I run that version on Windows 10 without this issue.
Have you checked on Oracle forums.
How to fix virtualbox failed to open a session for the virtual machine (version 6.0.12)
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Anonymous
Call to WHvSetupPartition failed: ERROR_SUCCESS (Last=0xc000000d/87) (VERR_NEM_VM_CREATE_FAILED).
| Result Code: | E_FAIL (0x80004005) |
|---|---|
| Component: | ConsoleWrap |
| Interface: | IConsole {872da645-4a9b-1727-bee2-5585105b9eed} |
Windows for home | Windows 10 | Security and privacy
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Martmcd 19,945 Reputation points Independent Advisor2019-09-26T10:43:40+00:00 Hi Verified:heavy_check_mark:5,
check that hyper-v is not turned on
click start, type turn windows features on or off
press enter
un-tick Hyper-v
un-tick sandbox
click OK
you may need to restart the host, before trying the VM again
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Anonymous
2019-09-26T10:41:11+00:00 This is the first install of VirtualBox on the host. Also I have checked the forums and other people have been having this issue, but I've tried the solutions listed on the forums and they haven't fixed the issue. Apparently it is something to do with Hyper-V but I am running Windows 10 Home.
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Neil D 31,975 Reputation points Volunteer Moderator2019-09-26T10:54:14+00:00 I've been running VirtualBox on Windows 10 Home for many year over many versions and is currently 6.0.12.
What version/build of Windows 10 do you have currently.
Settings in Installed windows features are set to default for me and Task Manager shows Virtualization is Enabled. What is your device spec or make and model.?
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Anonymous
2019-09-26T10:45:50+00:00 I am not using Windows 10 Pro, I am using Home.