parece que alguns arquivos estão faltando, tente desinstalá-lo e reinstalá-lo novamente:
Desinstalar
sudo apt-get remove software-center
Reinstale o centro de software
sudo apt-get update
sudo apt-get install software-center
Ei, então meu centro de software não instalará nenhum aplicativo, e fazer todo o meu computador congelar é o que diz quando digito software-center
lacy@lacy:~$ software-center
2013-11-10 15:47:13,139 - softwarecenter.ui.gtk3.app - INFO - setting up proxy 'None'
2013-11-10 15:47:13,955 - softwarecenter.backend.reviews - WARNING - Could not get usefulness from server, no username in config file
2013-11-10 15:47:13,957 - softwarecenter.plugin - INFO - activating plugin '<module 'webapps_activation' from '/usr/share/software-center/softwarecenter/plugins/webapps_activation.pyc'>'
2013-11-10 15:47:13,993 - softwarecenter.fixme - WARNING - logs to the root logger: '('/usr/lib/python2.7/dist-packages/gi/importer.py', 51, 'find_module')'
2013-11-10 15:47:13,992 - root - ERROR - Could not find any typelib for LaunchpadIntegration
2013-11-10 15:47:14,207 - softwarecenter.db.pkginfo_impl.aptcache - INFO - aptcache.open()
/usr/lib/python2.7/dist-packages/gi/overrides/GLib.py:532: Warning: value "101.000000" of type 'gdouble' is invalid or out of range for property 'value' of type 'gint'
return super(MainContext, self).iteration(may_block)
2013-11-10 15:47:29,480 - softwarecenter.fixme - WARNING - logs to the root logger: '('/usr/share/software-center/softwarecenter/utils.py', 271, 'get_title_from_html')'
2013-11-10 15:47:29,480 - root - WARNING - failed to parse: '<div style="background-color: #161513; width:1680px; height:200px;">
<div style="background: url('/site_media/exhibits/2013/09/AAMFP_Leaderboard_700x200_1.jpg') top left no-repeat; width:700px; height:200px;"></div>
</div>' ('ascii' codec can't encode character u'\xa0' in position 70: ordinal not in range(128))
2013-11-10 15:47:45,309 - softwarecenter.db.utils - INFO - software-center-agent finished with status 0
/usr/bin/software-center:184: Warning: value "101.000000" of type 'gdouble' is invalid or out of range for property 'value' of type 'gint'
Gtk.main()
lacy@lacy:~$
parece que alguns arquivos estão faltando, tente desinstalá-lo e reinstalá-lo novamente:
Desinstalar
sudo apt-get remove software-center
Reinstale o centro de software
sudo apt-get update
sudo apt-get install software-center