this is usually when addons are installed ... most of the time (per my experience) due to how the addon is created, some errors are caused in the installation process to an extent that installation hangs ... in terms of run-time, XPize in particular runs in the background for quite sometime (no offense meant XPero ) ... but you should not wait that long ... recreate your builds & try to remove any addon you might have ... attch your last_session.ini too ...