[Guide] How to Download and Install Latest Oracle VM VirtualBox Extension Pack 4.3.14 in Windows Host

Whenever Oracle releases update for their best and free desktop virtualization software, you must update the extension pack too. If you are a person using some of the advanced features such as USB 2.0 devices, VirtualBox RDP and PXE boot for Intel cards inside virtual machine, then you must update VirtualBox extension pack to latest version. This small guide shows how to download and install latest Oracle VM VirtualBox extension pack 4.3.12 on Windows 7 or Windows 8 host machines. Even though the screen shots are taken from older VirtualBox version but this will work with latest VirtualBox 4.3.14 also.

Normally if you open a saved or new virtual machine without updating extension pack but with older version, you will be getting an error message informing about USB2.0 and extension pack and VM will not start.

Either you need to disable USB2.0 controller for particular virtual machine or install/update the latest virtualbox extension pack. It is always better to have a guest Operating System with USB 2.0 support for faster data transfer.

If you want to start the virtual machine without installing latest extension pack, you can simply disable  USB2.0 support under VM settings as below.

remove usb2

Download  Link – Latest Oracle VM VirtualBox Extension Pack 4.3.14 here.

You can Install in Two Ways.

1) You can execute the downloaded file directly from Windows explorer. It will open VirtualBox program and prompt as below.


Press Install to start the installation.

See Also,

What’s new in Oracle VirtualBox 4

2) The other way is, go to File –> Preferences in menu bar and select Extensions option in VirtualBox console.


Press Add Extension button as shown in above screen and browse the downloaded VM VirtualBox Extension Pack. That’s it.

You can view the installed extension packages in same place.

Uninstalling an extension package can be done here by selecting the pack and click remove button as below.


This installation will fix the warning message of USB 2.0 support in Oracle VirtualBox and now you should be able to start new or saved virtual machines.

Extension pack installation is very important to run Mac OS X in VirtualBox as guest machine.


  1. says

    Thanks for the tutorial. I had an error when I tried to install it. It’s saying that the installer failed to rename the temporary directory to the final one: VERR_ACESS_DENIED…

    What am I doing wrong?

  2. says

    I had the same issue. Allowing the extension manager to run in administrator mode changes the error to (VERR_UNRESOLVED_ERROR) for the VBoxExtPackHelperApp.

    I uninstalled the previous 4.0.2, removed the leftover Extension Pack and reinstalled 4.0.4. This did not help and the error is still the same.

    Extension pack version and file name is: Oracle_VM_VirtualBox_Extension_Pack-4.0.4-70112.vbox-extpack

  3. goundy says

    I had the same issue.
    Allowing the extension manager to run in administrator mode changes the error to (VERR_UNRESOLVED_ERROR) for the VBoxExtPackHelperApp.

    so i think i gonna uninstall this update because its a total failing !!!
    the older worked perfectly, lets reinstallin it so !

  4. says


    – Open a command prompt as Administrator : Right-click on “Accessories\Command Prompt” and choose : Run As Administrator.
    – CD C:\Program Files\Oracle\VirtualBox
    – Make sure the ExtensionPack is located in the same directory
    – C:\Program Files\Oracle\VirtualBox>VBoxManage.exe extpack install Oracle_VM_Virt

    C:\Program Files\Oracle\VirtualBox>VBoxManage.exe extpack install Oracle_VM_VirtualBox_Extension_Pack-4.0.4-70112.vbox-extpack
    Successfully installed “Oracle VM VirtualBox Extension Pack”.

  5. jota says

    Gracias! este tutorial realmente me funcionó, es muy práctico y descriptivo por lo que resultó sencillo arreglar el molesto problema al restaurar la máquina virtual

  6. says

    In my Mac OS X 10.6.4 guest, there was an error “The USB device could not be mounted”. What I am trying to mount is a Sandisk Cruzer. Any ideas?

  7. GiUmato says

    Just my 2cents:
    I had troubles in re-installing Oracle_VM_VirtualBox_Extension_Pack-4.1.0-73009, as well as uninstalling it. Several attempts, both from the GUI and from the VBoxManage command line, ended with some VERR… error.

    In the end I managed to successfully uninstall and install again that extension pack from the command line, with following commands:

    “\Program Files\Oracle\VirtualBox\VBoxManage.exe” extpack clean

    “\Program Files\Oracle\VirtualBox\VBoxManage.exe” extpack uninstall “Oracle VM VirtualBox Extension Pack”

    “\Program Files\Oracle\VirtualBox\VBoxManage.exe” extpack install “Your\Path\To\Oracle_VM_VirtualBox_Extension_Pack-4.1.0-73009.vbox-extpack”


  8. teddy says

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