When I go to download an attachment it often takes 20 plus seconds between pushing the download (and I can hear something working away in there) to when the pinwheel appears and starts spinning. Another 20 seconds plus before the screen choice of where to save it appears. The disk is about half full. Besides the time machine disk there are 2 others plus dropbox. The machine is running 8 MEG. What is causing his inordinately long wait to start then long wait to index/list the folders? Its been doing this for about a month. I've run Mackeeper over it several times....??