Hi Arnaud, Oops - just noticed that i havn't answered to this. :-(
Regarding the Log-File, i don't see any hint which leads me to a direct solution, so if the problem still occurs it might the best to ask directly someone at the MiKTeX-Team (http://www.miktex.org/).
In the past we also found some very strange errors, depending on the fact, that the local anti-virus-program stickled with MiKTeX's installation routine.
So, if you can sort out, causes like missing administration rights, or not sufficient disk space, you could give it at try, by disabling the your anti-virus-program during MiKTeX's installation process.
Hope that might help - Thomas Am 18.05.2015 um 14:58 schrieb Arnaud CHOUX:
To whom it may concern, I tried to install MiKTeX. I skipped the uninstall step because I haven't installed any kind of TeX software on it previously. The installation has stopped, leaving this : "message: The operation failed for some reason.". I join you the log file. Can you please help me ? Cordially, A. Choux -- http://tug.org/protext/
-- http://tug.org/protext/
