Sorry, but "having a struggle loading" is a very very vague description of your problems.
Is the computer experiencing heavy CPU loads all of a sudden? Is your cursor choppy? Are you getting spinning beachballs? Or is it just that pages are loading slowly.
I'm guessing it's the latter - in that case, it doesn't have anything to do with your browser, it's most likely a problem with your internet connection. If it's shared, check if anyone is hogging it with torrents or any other P2P traffic. Try to remove all other software that uses the connection, reset your network/internet equipment and if the problems still persist, call your ISP.