virtualbox.org

Hi
I have been searching the net and many post about the error I am getting without any luck. I do hope that now I might solve my problem.

So I have been using Oracle Vmbox without any headaches for a long time. But since Last week I believe after my corporation did some windows updates all my virtual machine would not start normally. I was able to successfully start on headless mode my ubuntu servers.

The error:
Failed to open a session for the virtual machine ' ubuntu server'.

Failed to open a session for the virtual machine ubuntu server.

The virtual machine 'ubuntu server' has terminated unexpectedly during startup with exit code -1073741819 (0xc0000005).

Result Code: E_FAIL (0x80004005)
Component: MachineWrap
Interface: IMachine {85632c68-b5bb-4316-a900-5eb28d3413df}


I did all of the usual recommendations:
Uninstall and reboot the machine.
Remove the 5 vbox*. from WIndows\system32\drivers\
Reinstall the Oracle VM VirtualBox as administrator.

Tried to start the VMboxes but same error.

I also fallowed some recommendation to disable Hypervisor from an elevated CMD.

I was able to copy my vms to another machine and they started without a problem. So no error in the actual VM:s.

My Host is a windows 10 20H2.
I am not sure bu tI believe one of these are guilty.
KB5012599
KB5012117
Servicing Stack 10.0.19041.1704

I can't uninstall to test because it is a corporate machine that will install them back again .
We have Cylance Protect as anti-virus But I do not see anything that it says it blocks.

I do hope I have given enough information about my problem.
Please help.

Best Regards

Hi
So i found part of a solution:

It was for some reason Cylance Protect:
I did the fallowing:

In the Cylance dashboard, edit the device policy that is applied to the affected machines.

Those where already in place:
Under memory actions, exclude \Program Files\Oracle\VirtualBox\virtualbox.exe
Under protection settings, add an exception for C:\Program Files\Oracle\VirtualBox\

And I added also
Under memory actions, exclude \Program Files\Oracle\VirtualBox\virtualboxVM.exe

After that all is working well

It has been reported on these forums for several years that Cylance Protect interferes. It is notorious for it in fact.

https://www.google.com/search?hl=en&as_ ... type=&tbs=

Hi
The problem is making the support of the platform believe you. There are no logs showing in Cylancer de-Protect lol.

Anyway I am happy after one week of work I could find a solution.

foxerthefixer wrote:Those where already in place:
Under memory actions, exclude \Program Files\Oracle\VirtualBox\virtualbox.exe
Under protection settings, add an exception for C:\Program Files\Oracle\VirtualBox\

And I added also
Under memory actions, exclude \Program Files\Oracle\VirtualBox\virtualboxVM.exe

The extra exclusion is needed because VirtualboxVM.exe is the program that actually runs the VMs, whereas Virtualbox.exe is only the main Virtualbox window.