VirtualBox error Failed to open a session for the virtual machine

Question

I have a virtual machine with Windows XP with a clean installation  I set it as immutable to create a differential machine  so I create a new virtual machine  select the immutable hard disk and create a new snapshot in the new virtual machine folder   However  when I try to start the virtual machine I get this error     failed to open a session for the virtual machine    C  digo Resultado   VBOX E INVALID OBJECT STATE  0x80BB0007  Componente   ProgressProxy Interfaz   IProgress  c20238e4-3221-4d3f-8891-81ce92d9f913    What is the problem  until now I can use differential virtual machines without problems  I have installed the last version or VirtualBox v4 3 4 and the problem persists   If I set the hard driver as normal and I create a new virtual machine and select this hard drive I don t have any problem   EDIT  I use the same virtual disk and do the same steps in another computer and it works fine  I think that the problem is the VirtualBox of my computer with the problem  but I try to uninstall the program and reinstall it and the problem persists  so I don t know how to solve the problem   EDIT 2  if I set the virtual harddrive as multiattached instead of immutable  then it works fine  In my case is enough  but I know that it would be work as immutable because it was work until now and it works in another computer   I try to create a new user in windows to try if the problem if with the configuration of my account  but the problem persists  So I think that some general configuration of VirtualBox has been corrupted and I am not be able to repair it   I would like to know if there is any solution to use a immutable hard drive  because I would like to solve the problem with VirtualBox  although by the moment the multiattached hard disk is enough

User · Answer

If you are in Windows and the error message shows VT-x is not available make sure Hyper-V is disabled in Windows components

User · Answer

try this  sudo update-secureboot-policy --enroll-key   and restart your system  when restart it shows option and select Mok key and you will work fine

User · Answer

Something that I tried and work for me is simply you create a new virtual machine and you use the existing virtual hard disk file and everything is like you left it

User · Answer

For windows users                                                 I had the same issue  and this trick works for me   Goto control panel Open Uninstall program  Click on turn windows features on or off Scroll down and find the hyper-V folder  Uncheck the Hyper-V  Apply changes and restart your system  Now here you go    Open your virtual  box and start the os you want    Hope this helps

User · Answer

I had the same issue  I tried editing the VM but it wasn t letting me save it  So I tried the following    Tried editing the VM to change RAM CPU etc  but it wasn t letting me save it Deleted the vm  not the data  and tried adding it again  didn t fix it Tried moving the vbox file to another directory and import it  but it didn t let me move the vbox file so I realized there s a virtualbox process running that s holding a lock on it  So I killed that process and started it again and my VM booted

User · Answer

For MAC users  After some research  this worked for me     Quit VirtualBox Right click  Applications  folder Click on  Get Info  Change  Everyone  Permission to  Read Only  Open VirtualBox  and now it should work

User · Answer

Updating VirtualBox to newest version fixed my issue

User · Answer

Killing VM process dint work in my case   Right click on the VM and click on  Discard Saved State      This worked for me

User · Answer

Normally this error occurs when it try to load the previous state  This happened in Mac Virtual box   I tried after restarting the virtual box but again also i ve encountered this issue  Right Click on the operating system in the virtual box and then Click on the Discard Saved State    This fixed the issue

User · Answer

On Ubuntu  this can also be caused by incorrect permissions  I chmod 755 Logs  which fixed the issue

User · Answer

maybe it is caused by privilege  please try this    sudo chmod 755  Applications   sudo chmod 755  Applications Virtualbox app

[virtualbox] VirtualBox error "Failed to open a session for the virtual machine"

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