Welcome to Seven Forums bbailey. We will definitely need more information.
Which browser are you using, and does this issue appear if you use other browsers?
When the webpage "stops responding" as you say, do you get any error messages, or the page just appears to stop responding?
If you refresh the page, does it appear to start working normally agaon?
Can you post an example of a page that stops working? Something that doesn't require having membership to view.
I'm sure with more info, someone can give you some advice.