Windows Server 2019 doesn't boot

[Purclot]

Hi guys,
I'm using VirtualBox Version 6.1.4 r136177 (Qt5.6.2), Host-PC: Microsoft Windows 10 Pro, Hardware: DELL Precision Tower 3431.
Windows Server 2019 doesn't boot, the log file doesn't ring any bells for me (please see attachment).
Suprisingly enough Windows Server 2016 with the same configuration doesn't make any Problems.
Thanks for any help

[scottgus1]

Your log contains these lines:

{timestamp} HM: HMR3Init: Attempting fall back to NEM: VT-x is not available
{timestamp} NEM: WHvCapabilityCodeHypervisorPresent is TRUE, so this might work...

You might notice in the guest window's Status Bar the green turtle: The choice of animal is appropriate: Your guest is running, just really slow. This is because a service that uses Microsoft Hyper-V is running on your host PC. Normally Hyper-V blocks Virtualbox. But your PC is of the type and OS where Virtualbox can attempt to run the guest using the Hyper-V engine. This arrangement is still being developed and isn't 100% yet.

If VirtualBox is running without Hyper-V enabled, and nothing else is interfering with hardware virtualization (VT-x / AMD-V), then the usual virtualization icon () will be seen in the Status Bar.

To turn Hyper-V off completely, do this:

1. Shut down all programs. You will have to reboot your host.

2. Look into the 64-bits tutorial, 2nd post, points 2 & 3 and ensure that none of these things are running.

3. Find the Command Prompt icon, right click it and choose Run As Administrator.

4. Enter this command:

bcdedit /set hypervisorlaunchtype off

5. Enter this command:

shutdown -s -t 2

6. When the computer turns off, unplug it for 20 seconds. Then plug it in again and boot up Windows 10.

Your Virtualbox should be running now. If the green turtle still appears and the tell-tale lines are in the log, try all the steps again. If you don't get the standard virtualization icon, post back exactly what you did and we'll try to help some more.

For further info, see I have a 64bit host, but can't install 64bit guests and https://www.tenforums.com/tutorials/139 ... puter.html

[Purclot]

hi there,
still doesn't work. I executed the command you gave and additionally stopped all hyper-V Services on the machine and rebooted the PC twice...
The green turtle is still there (running Windows Server 2016) and Windows Server 2019 stops with error (log as Attachement).
I still don't know what Kind of an acceleration should be choosen (None, Default, legacy etc)?
Thanks for any help

[Purclot]

hi again,
apparently the command: "bcdedit /set hypervisorlaunchtype off " doesn't do the trick.
While running: OptionalFeatures.exe I noticed the Hyper-V Services were still running, so I unload the feature.
Now the green turtle disappeared and all works fine.
Still the Question About the acceleration type: None, Default, Hyper-V etc? Or it doesn't matter?

[scottgus1]

the green turtle disappeared and all works fine.

Excellent!

Regarding the Acceleration, It looks like you're after the right setting in the Paravirtualization dropdown. I'd just use 'Default' & let Virtualbox figure it out.