Not possible to use release upgrader w/ Zorin OS because main is from a PPA

[Marcus]

No valid mirror found

While scanning your repository information no mirror entry for the upgrade was found. This can happen if you run an internal mirror or if the mirror information is out of date.

Do you want to rewrite your 'sources.list' file anyway? If you choose 'Yes' here it will update all 'saucy' to 'trusty' entries.
If you select 'No' the upgrade will cancel.

Click "YES" Then

Invalid package information

After updating your package information, the essential package 'ubuntu-minimal' could not be located. This may be because you have no official mirrors listed in your software sources, or because of excessive load on the mirror you are using. See /etc/apt/sources.list for the current list of configured software sources.
In the case of an overloaded mirror, you may want to try the upgrade again later.

ProblemType: Bug
DistroRelease: Zorin OS 8
Package: ubuntu-release-upgrader-core 1:0.205.4 [origin: unknown]
ProcVersionSignature: Ubuntu 3.11.0-17.31-generic 3.11.10.3
Uname: Linux 3.11.0-17-generic i686
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: i386
CrashDB: ubuntu
Date: Tue Aug 25 16:01:53 2015
InstallationDate: Installed on 2015-08-25 (0 days ago)
InstallationMedia: Zorin 8 - Release i386
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to saucy on 2015-08-25 (0 days ago)
VarLogDistupgradeAptlog:
 Log time: 2015-08-25 16:00:46.169237
 Log time: 2015-08-25 16:00:47.200460
 Log time: 2015-08-25 16:01:33.453425
 Log time: 2015-08-25 16:01:53.600601
VarLogDistupgradeTermlog:

[Marcus (msutherland638)]

What do i do.

[Marcus (msutherland638)]

also when installing a program i want to install i get this

Requires installation of untrusted package

This requires installing packages from unauthenticated sources

Please help me on both.

Thanks.. Marcus

PC Professional

[Brian Murray (brian-murray)]

Zorin OS seems to setup apt without main from the Ubuntu archive and only main from a PPA. The release upgrader disables PPAs and then the upgrade fails.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.