I had this problem and changing the software source server fixed it for me.
System -> Admin -> Software Sources.
http://ubuntuforums.org/showthread.php?t=1339490&page=2
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Untrusted packages not installable
https://bugs.launchpad.net/bugs/464101
You received this bug notification because you are
I had almost exactly the same experience except that:
"Exception during pm.DoInstall(): E:Sub-process /usr/bin/dpkg returned
an error code (2)"
was
"Exception during pm.DoInstall(): E:Sub-process /usr/bin/dpkg returned
an error code (1)"
for mine.
I can attach log files if required.
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Upgra
Thanks for the solution Ben, that worked for me. I had the same error on
a clean install of 8.10 amd64, I had already used the same media for an
install on a different machine and I did not have this problem. I see
that this bug is marked to expire because it is incomplete that would be
unfortunate
