Windows 10: VirtualBox VM Inaccessible error on Windows 11

Discus and support VirtualBox VM Inaccessible error on Windows 11 in Windows 10 News to solve the problem; [ATTACH]Your virtual machine suddenly shows as Inaccessible with a Document is empty error, and you can’t start it. This usually means VirtualBox can’t... Discussion in 'Windows 10 News' started by WinClub, Jun 25, 2026 at 3:37 PM.

  1. WinClub New Member

    VirtualBox VM Inaccessible error on Windows 11


    VirtualBox VM Inaccessible error on Windows 11 VirtualBox-VM-Inaccessible.png
    Your virtual machine suddenly shows as Inaccessible with a Document is empty error, and you can’t start it. This usually means VirtualBox can’t read the essential configuration file for that VM. The good news is that you can often recover it without losing your data. In this post, we will see what you can do […]

    This article VirtualBox VM Inaccessible error on Windows 11 first appeared on TheWindowsClub.com.

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  2. Problem activating Windows 11 after switching VMs

    Hi there,

    I purchased Windows 11 Home a couple of months ago and installed it on a VirtualBox VM. But VirtualBox was crashing quite a bit so I deactivated Windows 11 using the following commands:

    • slmgr /upk
    • slmgr /cpky
    (as suggested on https://answers.microsoft.com/en-us...d-on-old/f7f1ba9d-ba45-4394-9bbd-4d4d2c466879 ) and then installed it on a VMWare VM. Problem is, I can't activate Windows on the new VM even though it was deactivated on the old VM. I tried the recommended Troubleshooting Wizard solutions to no available and I couldn't find a Microsoft email address or support number, so I am posting here. Can anyone suggest how to contact Microsoft about this activation issue?

    Thanks,

    Darryl

    PS: I have already deleted the old VM so I can't log back onto it.
     
    DarrylStaflund, Jun 25, 2026 at 3:41 PM
    #2
  3. Ramesh Srinivasan, Jun 25, 2026 at 3:41 PM
    #3
  4. kbratko Win User

    VirtualBox VM Inaccessible error on Windows 11

    0xC004C008 - Activation fails in Oracle VM VirtualBox

    Hi,

    after installing Windows 11 on Oracle VM VirtualBox in settings window I get message Activation State - Not Active (We can't activate Windows on this device because the product key was already used on another device. If you think it wasn't used on another device, select Troubleshoot below. Error code: 0xC004C008.)

    Before installation on Oracle VM VirtualBox I installed it on Gnome Boxes. Due to low performance I removed Windows 11 installation from Gnome Boxes and installed it to Oracle VM VirtualBox where performance is great.

    When I press Troubleshoot button, and go through sequence of questions it ends up with error: Oops... We encountered an unexpected issue. Please try again in sometime.

    I tried manually enter new key in Terminal using slmgr.vbs -ipk ... which gives me message that product key was successfully entered.

    Sincerely,

    KB
     
Thema:

VirtualBox VM Inaccessible error on Windows 11

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