package virtualbox-ext-pack 5.1.6-2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Graig]

For several months. every time I need to run Virtualbox, I have to reinstall it and use it immediately. After rebooting the computer, it is gone again. This particular report was generated during the installation of the upgrade from 16.04 to 16.10

The error message follows:

Could not install 'virtualbox-ext-pack'
The upgrade will continue but'virtualbox-ext-pacl' may not be in a working state. Please consider submitting a bug report about it.
subprocess installed post-installation script returned error exit status 1

ProblemType: Package
DistroRelease: Ubuntu 16.10
Package: virtualbox-ext-pack 5.1.6-2
ProcVersionSignature: Ubuntu 4.4.0-53.74-generic 4.4.30
Uname: Linux 4.4.0-53-generic x86_64
ApportVersion: 2.20.3-0ubuntu8.2
Architecture: amd64
Date: Mon Dec 19 17:23:45 2016
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2014-01-10 (1074 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.18.10ubuntu1
 apt 1.3.3
SourcePackage: virtualbox-ext-pack
Title: package virtualbox-ext-pack 5.1.6-2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to yakkety on 2016-12-20 (0 days ago)

[Gianfranco Costamagna (costamagnagianfranco)]

please enable proposed and use that one