3 GB ram, nothing added. It came installed. The computer was fine until just a few weeks ago. Yes, I have upgraded, and added programs, but I would really have to spend time to figure out which programs were added when. What hangs? Certain games, like scrabble - usually have to force quit. As far as quits - Safari (a lot), versiontracker, browseback, scrabble. Also, just within the last week, when I attach my camera, the icon doesn't show on the desktop. I have to restart, and then it's fine. I have also, within the last week, noticed that my printer doesn't always want to print. The window comes up, but nothing happens. Again, a restart fixes it. No, I have not run DW, since I was waiting for the update CD. I downloaded it, but really would prefer having the CD on hand. . I also noticed, that of the seven lights on my USB hub, one of them periodically goes out, comes back, goes out, etc. I don't think any of the peripherals have been affected. I don't know which light, if any, represents any particular peripheral. I have two printers, scanner, Palm, headphone, iPod, and two cameras. A couple of them are attached to the keyboard, the others to the hub.Just now, I quit out of Mail, and noticed that it was still showing in the menubar, and was still highlighted in the dock. It took almost a minute to disappear.