How do you mean about "cuts out on me"?.
Is it your browser (Internet Explorer,Firefox,Opera etc)that closes or do you get a blue screen?.
Are there any error messages, such like 'There is a problem,Internet Explorer is closing down' and the page then shuts down. What browser are you using?.
Are you using (browsing) two different websites at the same time, and both websites are doing the same thing and closing down?.