package libidn11:amd64 1.32-3ubuntu1.1 failed to install/upgrade: package libidn11:amd64 is already installed and configured

[Confidential]

The version I'm using is Xenial 16.04 LTS and I'm trying to install VirtualBox. I've tried to install the software through the terminal and Software Center but the install halts and sends me error messages. I can still launch the software but at the terminal I'm prompted:

WARNING: The character device /dev/vboxdrv does not exist.
  Please install the virtualbox-dkms package and the appropriate
  headers, most likely linux-headers-generic.

  You will not be able to start VMs until this problem is fixed.

When trying to run KaliLinux on the VirtualBox platform I'm prompted:

Kernel driver not installed (rc=-1908)

The VirtualBox Linux kernel driver (vboxdrv) is either not loaded or there is a permission problem with /dev/vboxdrv. Please install virtualbox-dkms package and load the kernel module by executing

'modprobe vboxdrv'

as root. If it is available in your distribution, you should install the DKMS package first. This package keeps track of Linux kernel changes and recompiles the vboxdrv kernel module if necessary.

where: suplibOsInit what: 3 VERR_VM_DRIVER_NOT_INSTALLED (-1908) - The support driver is not installed. On linux, open returned ENOENT.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: libidn11:amd64 1.32-3ubuntu1.1
ProcVersionSignature: Ubuntu 4.4.0-57.78-generic 4.4.35
Uname: Linux 4.4.0-57-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.4
AptdaemonVersion: 1.1.1+bzr982-0ubuntu14
Architecture: amd64
Date: Thu Jan 5 20:19:33 2017
Dependencies:
 gcc-6-base 6.0.1-0ubuntu1
 libc6 2.23-0ubuntu5
 libgcc1 1:6.0.1-0ubuntu1
DuplicateSignature:
 package:libidn11:amd64:1.32-3ubuntu1.1
 Processing triggers for shared-mime-info (1.5-2ubuntu0.1) ...
 dpkg: error processing package libidn11:amd64 (--configure):
  package libidn11:amd64 is already installed and configured
ErrorMessage: package libidn11:amd64 is already installed and configured
InstallationDate: Installed on 2017-01-05 (0 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.15ubuntu0.2
SourcePackage: dpkg
Title: package libidn11:amd64 1.32-3ubuntu1.1 failed to install/upgrade: package libidn11:amd64 is already installed and configured
UpgradeStatus: No upgrade log present (probably fresh install)

[Confidential (jimmyappleseed)]

UPDATE to given issue.

In order to solve this given issue with the error prompts that I received at the terminal and when I ran a VM, the issue didn't relate to a bug, but rather a few configuration problems I had. After scurrying the Internet I discovered that Secure Boot in my bios was stopping VirtualBox from completely downloading. This is due to Secure Boot not allowing third-party programs from completely executing. In order to turn this off I accessed my bios settings upon boot and disabled Secure Boot. To do this it varies from system to system but there's a plethora of information to do this on the Web.

However after this I found that Virtual Box was still not working properly. By looking on the Internet some more I discovered that two versions of VirtualBox were on my host (specifically VirtualBox 5.0 and 5.1). In order to discover this I typed the following script at the command line:

dpkg --list | grep virtualbox

From here I typed that following lines to uninstall multiple versions:

sudo apt-get remove virtualbox-\*
sudo apt-get purge virtualbox-\*

Then I followed these scripts to reinstall VirtualBox:

[Add Virtualbox Repository]
$ sudo sh -c "echo 'deb http://download.virtualbox.org/virtualbox/debian '$(lsb_release -cs)' contrib non-free' > /etc/apt/sources.list.d/virtualbox.list"

[Import Oracle Public Key]
$ wget -q http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc -O- | sudo apt-key add -

[Install dependency packages]
$ sudo apt-get install dkms

[Update Repository Index]
$ sudo apt-get update

[Install VirtualBox]
$ sudo apt-get install virtualbox-5.1

I hope this helps as it took me days of troubleshooting to discovery what I needed to do.