Failed to install VirtualBox_Extension_Pack-4.1.14-77440

[echidna]

Failed to install the Extension Pack

C:/Users/<user>/Downloads/Oracle_VM_VirtualBox_Extension_Pack-4.1.14-77440.vbox-extpack.

The installer failed with exit code 1: 

VBoxExtPackHelperApp.exe: error: Failed to rename the temporary directory to the final one: VERR_ACCESS_DENIED 

('C:\Program Files\Oracle\VirtualBox/ExtensionPacks/Oracle_VM_VirtualBox_Extension_Pack-_-inst-3680' -&gt; 'C:\Program Files\Oracle\VirtualBox/ExtensionPacks/Oracle_VM_VirtualBox_Extension_Pack')
rcExit=1.

Result Code: E_FAIL (0x80004005)
Component: ExtPackManager
Interface: IExtPackManager {3295e6ce-b051-47b2-9514-2c588bfe7554}

[Frank Mehnert]

Please place the downloaded extension pack into a directory which is writable by the administrator.

[odupuy]

See my comments in https://www.virtualbox.org/ticket/10906#comment:6

You may have an "Oracle_VM_VirtualBox_Extension_Pack - uninst" directory present in which case the installer cannot rename the existing "Oracle_VM_VirtualBox_Extension_Pack" to it. Delete/rename the uninst folder and retry.

The installer should take care of this.