virtualbox.org

I encountered a problem when I create more than one VM on my machine. When the second one is created none of them will boot. Both of them are linux, first is debian and secound is Tails. I can't even install tails and it can't boot from "cd". The debian one won't boot, it freezes after message "starting raise network interfaces" or "Paths". I tried reinstaling VMs, Vbox and only solution was reinstalling the system. After pure instalation it stared working but when few more updates come by it stoped the same as before. I can't even tell which update could break it because i wasn't paying attention and didn't fire it up every time I installed something new on this system. Currently I'm using Windows 10 pro version 2004 64 bit, os build 19041. If it have to do with hardware my spec : i5-3450, GTX760, 16Gb ram.

Only things I could find:

NtOpenDirectoryObject failed on \Driver: 0xc0000022

It showed 4 times.

Start the guest from full normal shutdown, not save-state. Run until you see the problem happen, then shut down the guest from within the guest OS if possible. If not possible, close the Virtualbox window for the guest with the Power Off option set.

Please zip and post the guest's vbox.log, using the forum's Upload Attachment tab.

Did as you asked. Hope it can help find solution

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

3. Enter this command:

bcdedit /set hypervisorlaunchtype off

4. Enter this command:

shutdown -s -t 2

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

If your Virtualbox does not start successfully, see I have a 64bit host, but can't install 64bit guests. The 64-bits tutorial has a couple more things to look for in step 2. For further info, see https://www.tenforums.com/tutorials/139 ... puter.html

It worked! You're the best man! Thank you very much! You just saved my life I hope everything is great in your life and like they say: "Not every hero wears a cape" and definitely this applies here. Cheers mate.

Glad you're up and running! Others deserve the praise, though; stronger heads than mine figured this out. A lot more Robin than Batman on this end...