I have had the same problem with AOL. Well it isn't AOL anymore ( changed over to the carphonewarehouse network the other week ) but still trades under the name of AOL.

The answer was dropping the MTU from 1492 to 1400. This solved the problem of pages like hotmail and barclays not showing when others ( google and ebay ) worked fine.

Maybe if you are having this seemingly randomly stopped web page problem it might be worth looking into the MTU solution but make sure you note what it was set at originally as this makes changes to the router ( hence both laptop and computer having the problem when fed through one router ) either directly or from the PC/laptop on login.