In certain contexts debian packages are reluctant to install using gdebi
or software center due to dependencies problem. In that case, you can
install .deb file using following command,
dpkg --force-all -i PackageName
e.g. dpkg --force-all -i google-chrome-stable_current_i386.deb
dpkg --force-all -i PackageName
e.g. dpkg --force-all -i google-chrome-stable_current_i386.deb