will not upgrade. Keeps saying that there is software that keeps it from running.

[Eric]

I'm using 14.04.02 LTS. I expected an upgrade to 14.10. Some 3rd party sources were disabled. After that I got:
"An unresolvable problem occurred while calculating the upgrade.

 This can be caused by:
 * Upgrading to a pre-release version of Ubuntu
 * Running the current pre-release version of Ubuntu
 * Unofficial software packages not provided by Ubuntu

If none of this applies, then please report this bug using the command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal."

As you can see, I followed the instructions. I removed all of the Kali Linux tools I had (from an older version) and it still didn’t work.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.7
ProcVersionSignature: Ubuntu 3.13.0-49.83-generic 3.13.11-ckt17
Uname: Linux 3.13.0-49-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3.10
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Mon Apr 27 20:58:53 2015
EcryptfsInUse: Yes
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2015-04-28 (0 days ago)
VarLogDistupgradeTermlog:

mtime.conffile..etc.update.manager.release.upgrades: 2015-04-26T19:08:21.583125