I'm very low tech, so I was just suggesting something that has helped me when my computer was slow. Hopefully, other people will respond to your question with more helpful information.
If you want to try clearing your cache, cookies etc., you can start by looking on your toolbar for "Tools." For me, under Tools, I select "Clear Recent History." That gives me a pop-up box. In that box, I check Browsing and Download History, Cookies and Cache. Then I hit the button that says, "Clear Now."
(After I clear these things, I re-start my computer and then I have to re-enter my password for SA, and re-enter some of the other things my computer remembered for me, like my email address, but to me, it is worth it.)
Hope this helps...or at least make sense.
