Annon, that was very unhelpful. Did you not notice that this is the Apple section of the forum? That means a Microsoft webpage won't help at all!
smf, I don't know too much about macs, but I suspect that if the ram is already maxed out, there isn't too much more you can do. We do have a member that checks back in with this site about once every week or two that has considerably more knowledge than I do. Maybe he'll have some suggestions.
You could try deleting some old files, clearing the internet cache, or defragging your hard drive. That tends to help with windows.