I cannot help I am such computer illiterate but yesterday my computer was extremely slow .. everything was slow my applications didn't work (neither real player nor window media pleyer) and when I chatted with my friends what I typed took forvever to appear on the window and same when I hit the sent button ... then I re-started and everythng was fine again ... I don't know what happened but maybe as I bragged mac never have problems it was the some prooves it wasn't true LOL