package crashed on startup the computer

This package crashed on startup the computer

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: dc (not installed)
ProcVersionSignature: Ubuntu 3.19.0-51.58~14.04.1-generic 3.19.8-ckt13
Uname: Linux 3.19.0-51-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
Date: Fri Apr 22 23:06:58 2016
DuplicateSignature: package:dc:(not installed):trying to overwrite '/usr/bin/dc', which is also in package libkeyutils1:amd64 1.5.6-1
ErrorMessage: trying to overwrite '/usr/bin/dc', which is also in package libkeyutils1:amd64 1.5.6-1
InstallationDate: Installed on 2016-02-27 (55 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.5
 apt 1.0.1ubuntu2.13
SourcePackage: bc
Title: package dc (not installed) failed to install/upgrade: trying to overwrite '/usr/bin/dc', which is also in package libkeyutils1:amd64 1.5.6-1
UpgradeStatus: No upgrade log present (probably fresh install)