virtualbox Raw-mode is unavailable courtesy of Hyper-V windows 10

Disabling Device Guard or Credential Guard fixed for me:

  • click Start > Run, type gpedit.msc, and click Ok. The Local Group Policy Editor opens. Go to Local Computer Policy > Computer Configuration > Administrative Templates > System > Device Guard > Turn on Virtualization Based Security. Select Disabled.
  • Go to Control Panel > Uninstall a Program > Turn Windows features on or off to turn off Hyper-V.

Select. Do not restart.

Delete the related EFI variables by launching a command prompt on the host machine using an Administrator account and run these commands:

mountvol X: /s
copy %WINDIR%\System32\SecConfig.efi X:\EFI\Microsoft\Boot\SecConfig.efi /Y
bcdedit /create {0cb3b571-2f2e-4343-a879-d86a476d7215} /d "DebugTool" /application osloader
bcdedit /set {0cb3b571-2f2e-4343-a879-d86a476d7215} path "\EFI\Microsoft\Boot\SecConfig.efi"
bcdedit /set {bootmgr} bootsequence {0cb3b571-2f2e-4343-a879-d86a476d7215}
bcdedit /set {0cb3b571-2f2e-4343-a879-d86a476d7215} loadoptions DISABLE-LSA-ISO,DISABLE-VBS 
bcdedit /set {0cb3b571-2f2e-4343-a879-d86a476d7215} device partition=X:
mountvol X: /d

Note: Ensure X is an unused drive, else change to another drive.

Restart the host. Accept the prompt on the boot screen to disable Device Guard or Credential Guard.

Source: https://kb.vmware.com/s/article/2146361

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