On Sun, 2015-02-22 at 23:48 +0100, Nikolai Faßbender wrote: > can I switch from 14:10 to 14:04 LTS without any problems? If you mean, can you switch without reinstalling then the answer is no. Downgrades between major versions are not supported in Ubuntu (or any other major distro that I'm aware of) except by reinstalling.