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change mirrors.txt (not available at this time) to http://ftp.uni-stuttgart.de/ubuntu/
do-release-upgrade
reboot
enable auto Login
activate third-party repos again.
apt-get update && apt-get dist-upgrade
SOURCE.LIST BEFORE UPDATE http://paste.ubuntu.com/8427292/
run AVWizard
And patients, patients, patients, more patients, more more patients…