daniel@SPECTRE4:~$ sudo apt-get install virtualbox
[sudo] password for daniel: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following package was automatically installed and is no longer required:
  linux-image-generic
Use 'apt-get autoremove' to remove it.
The following extra packages will be installed:
  virtualbox-dkms virtualbox-qt
Suggested packages:
  vde2 virtualbox-guest-additions-iso
The following NEW packages will be installed:
  virtualbox virtualbox-dkms virtualbox-qt
0 upgraded, 3 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/21.2 MB of archives.
After this operation, 89.9 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Selecting previously unselected package virtualbox.
(Reading database ... 268362 files and directories currently installed.)
Preparing to unpack .../virtualbox_4.3.26-dfsg-2ubuntu2_amd64.deb ...
Unpacking virtualbox (4.3.26-dfsg-2ubuntu2) ...
Selecting previously unselected package virtualbox-dkms.
Preparing to unpack .../virtualbox-dkms_4.3.26-dfsg-2ubuntu2_all.deb ...
Unpacking virtualbox-dkms (4.3.26-dfsg-2ubuntu2) ...
Selecting previously unselected package virtualbox-qt.
Preparing to unpack .../virtualbox-qt_4.3.26-dfsg-2ubuntu2_amd64.deb ...
Unpacking virtualbox-qt (4.3.26-dfsg-2ubuntu2) ...
Processing triggers for systemd (219-7ubuntu6) ...
Processing triggers for ureadahead (0.100.0-19) ...
Processing triggers for man-db (2.7.0.2-5) ...
Processing triggers for gnome-menus (3.10.1-0ubuntu5) ...
Processing triggers for desktop-file-utils (0.22-1ubuntu3) ...
Processing triggers for bamfdaemon (0.5.1+15.04.20150202-0ubuntu1) ...
Rebuilding /usr/share/applications/bamf-2.index...
Processing triggers for mime-support (3.58ubuntu1) ...
Processing triggers for shared-mime-info (1.3-1) ...
Unknown media type in type 'all/all'
Unknown media type in type 'all/allfiles'
Processing triggers for hicolor-icon-theme (0.14-0ubuntu1) ...
Setting up virtualbox (4.3.26-dfsg-2ubuntu2) ...
Setting up virtualbox-dkms (4.3.26-dfsg-2ubuntu2) ...
Loading new virtualbox-4.3.26 DKMS files...
First Installation: checking all kernels...
Building only for 3.19.0-28-generic
Building initial module for 3.19.0-28-generic
Done.

vboxdrv:
Running module version sanity check.
Error! Module version 4.3.26_Ubuntu for vboxdrv.ko
is not newer than what is already found in kernel 3.19.0-28-generic (5.0.4).
You may override by specifying --force.

vboxnetadp.ko:
Running module version sanity check.
Error! Module version 4.3.26_Ubuntu for vboxnetadp.ko
is not newer than what is already found in kernel 3.19.0-28-generic (5.0.4).
You may override by specifying --force.

vboxnetflt.ko:
Running module version sanity check.
Error! Module version 4.3.26_Ubuntu for vboxnetflt.ko
is not newer than what is already found in kernel 3.19.0-28-generic (5.0.4).
You may override by specifying --force.

vboxpci.ko:
Running module version sanity check.
Error! Module version 4.3.26_Ubuntu for vboxpci.ko
is not newer than what is already found in kernel 3.19.0-28-generic (5.0.4).
You may override by specifying --force.

depmod....

DKMS: install completed.
Setting up virtualbox-qt (4.3.26-dfsg-2ubuntu2) ...
Processing triggers for systemd (219-7ubuntu6) ...
Processing triggers for ureadahead (0.100.0-19) ...