Software packages won't download because of "insserv" and "virtualbox"

All of the packages I try to install won't because of a problem with "insserv" and virtualbox. It's probably because of VirtualBox, but I don't know what part of it is causing the error. I'd like to know what part (or if I'm wrong whatever in Ubuntu) is causing the problem and how to fix it.

Info

I don't know if any of the hardware info matters, but it might.

Software + OS

I have VirtualBox 5.1 and the extension pack installed on Ubuntu Xenial (16.04 LTS). If it matters, I have Windows XP Pro with Guest Additions installed, FreeDOS, and Puppy Linux (Racy) installed, all in ~/VirtualBox VMs/.

Hardware

Dell Precision M6300 (yes, I am old) with a NVIDIA G84GLM (Quadro FX 1600M) card, a Broadcom BCM4312 802.11b/g LP-PHY (Wireless 1395 WLAN Mini Card), and an unknown one with a driver for "Processor microcode firmware for Intel CPUs".

Latest Encounter

An error when trying to install BleachBit (about 10 minutes ago):

installArchives() failed: Selecting previously unselected package menu.
(Reading database ... 
(Reading database ... 5%%
(Reading database ... 10%%
(Reading database ... 15%%
(Reading database ... 20%%
(Reading database ... 25%%
(Reading database ... 30%%
(Reading database ... 35%%
(Reading database ... 40%%
(Reading database ... 45%%
(Reading database ... 50%%
(Reading database ... 55%%
(Reading database ... 60%%
(Reading database ... 65%%
(Reading database ... 70%%
(Reading database ... 75%%
(Reading database ... 80%%
(Reading database ... 85%%
(Reading database ... 90%%
(Reading database ... 95%%
(Reading database ... 100%%
(Reading database ... 224061 files and directories currently installed.)
Preparing to unpack .../menu_2.1.47ubuntu1_i386.deb ...
Unpacking menu (2.1.47ubuntu1) ...
Selecting previously unselected package bleachbit.
Preparing to unpack .../bleachbit_1.10-1_all.deb ...
Unpacking bleachbit (1.10-1) ...
Selecting previously unselected package python-notify.
Preparing to unpack .../python-notify_0.1.1-4_i386.deb ...
Unpacking python-notify (0.1.1-4) ...
Processing triggers for man-db (2.7.5-1) ...
Processing triggers for install-info (6.1.0.dfsg.1-5) ...
Processing triggers for doc-base (0.10.7) ...
Processing 1 added doc-base file...
Processing triggers for gnome-menus (3.13.3-6ubuntu3) ...
Processing triggers for desktop-file-utils (0.22-1ubuntu5) ...
Processing triggers for mime-support (3.59ubuntu1) ...
Processing triggers for bamfdaemon (0.5.3~bzr0+16.04.20160415-0ubuntu1) ...
Rebuilding /usr/share/applications/bamf-2.index...
Setting up virtualbox (5.0.18-dfsg-2build1) ...
insserv: script virtualbox: service vboxdrv already provided!
insserv: exiting now!
update-rc.d: error: insserv rejected the script header
dpkg: error processing package virtualbox (--configure):
 subprocess installed post-installation script retued error exit status 1
dpkg: dependency problems prevent configuration of virtualbox-qt:
 virtualbox-qt depends on virtualbox (= 5.0.18-dfsg-2build1); however:
  Package virtualbox is not configured yet.
  Package virtualbox-4.3 which provides virtualbox is not installed.

dpkg: error processing package virtualbox-qt (--configure):
  dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
Setting up menu (2.1.47ubuntu1) ...
Setting up python-notify (0.1.1-4) ...
Processing triggers for menu (2.1.47ubuntu1) ...
Setting up bleachbit (1.10-1) ...
Errors were encountered while processing:
 virtualbox
 virtualbox-qt
Setting up virtualbox (5.0.18-dfsg-2build1) ...
insserv: script virtualbox: service vboxdrv already provided!
insserv: exiting now!
update-rc.d: error: insserv rejected the script header
dpkg: error processing package virtualbox (--configure):
 subprocess installed post-installation script retued error exit status 1
dpkg: dependency problems prevent configuration of virtualbox-qt:
 virtualbox-qt depends on virtualbox (= 5.0.18-dfsg-2build1); however:
  Package virtualbox is not configured yet.
  Package virtualbox-4.3 which provides virtualbox is not installed.

dpkg: error processing package virtualbox-qt (--configure):
 dependency problems - leaving unconfigured

This problem has persisted for everything I don't get off the software center or the install DVD (which I only used to get the Broadcom driver).

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