VirtualBox- error: extension pack directory: VERR_ALREADY_EXISTS

October 2016


VirtualBox offers an update of its expansion pack, and when you download the installation process, an error message (example below) is displayed:

Failed to install the extension

C:/Users/aquarelle/Downloads/Oracle_VM_VirtualBox_Extension_Pack-x.x.x-xxxxx.vbox-extpack. Échec de l'installation de l'extension C:/Users/aquarelle/Downloads/Oracle_VM_VirtualBox_Extension_Pack-y.y.y-yyyyy.vbox-extpack.

The installer failed with exit code 1: VBoxExtPackHelperApp.exe: error: Failed to rename the extension pack directory: VERR_ALREADY_EXISTS

Code d'erreur : E_FAIL (0x80004005)
Composant : ExtPackManager
Interface : IExtPackManager {3295e6ce-b051-47b2-9514-2c588bfe7554}


To handle problem and install the update.
  • First, close all running instances of VirtualBox.
  • Then run a command prompt (Start> Programs> Accessories> Command Prompt)

Enter the following command:

Then, start VirtualBox and update the expansion pack.

Related :

This document entitled « VirtualBox- error: extension pack directory: VERR_ALREADY_EXISTS » from CCM ( is made available under the Creative Commons license. You can copy, modify copies of this page, under the conditions stipulated by the license, as this note appears clearly.