the internets.
Pages just stop loading. It has something to do with the wireless adapter I think. The worst thing I can do when it happens is try to repair the connection. It freezes at disabling, then I have to reboot twice to get it to work again. If I just reboot when it happens I only have to reboot once.
My computer at work has a similar problem. It seems to happen when I have several windows/files open at the same time. If I close a few it helps. Mine doesn't freeze up most of the time it just gets real slow. If it freezes I ctrl-alt-delete to get out so I can start over.
Good luck with the problem.