I found out that the problem was wireless connection did'nt work with Software
Center.
Connected with cable, and now it's working.
But trying install Libre Office Writer, I get this:
The following packages have unmet dependencies:
libreoffice-writer: Depends: libreoffice-core (=
First run sudo apt-get upgrade which will upgrade all packages. If
that doesn't fix the issue you can use sudo apt-get purge libreoffice-
core and sudo apt-get purge libreoffice-base-core and then install
libreoffice-writer, which will grab the correct dependancies. If this
resolves the issue,
