not able to install any software....and while updating os runs partial upgrade...there was amessage saying can't install ubuntu desktop

[ashish]

after installinf ubuntu14.04 while upgrading os didn't updated properly after thet every time i try to install any software like vlc media player or any other software there was a message saying package dependacies cannot be resolved im not able to play any video file and cant install a single software....i reinstalled the full os but the proble remains the same.....

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.2 [origin: unknown]
ProcVersionSignature: Ubuntu 3.13.0-38.65somerville1-generic 3.13.11.9
Uname: Linux 3.13.0-38-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Sat Nov 26 19:29:00 2016
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-trusty-amd64-20140620-0
InstallationDate: Installed on 2016-11-26 (0 days ago)
InstallationMedia: Ubuntu 14.04 "Trusty" - Build amd64 LIVE Binary 20140620-04:25
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.update.manager.release.upgrades: 2014-06-20T09:43:50