由前日開始....我屋企不能連線到msn

What do you use for connection? dial up or broadband?
I have this experience once>>actually not long ago, about one month ago
I think you can try to download msn and install it again.
Or you can use the troubleshooting that window has.
(my computer was a new one when there is problem)
also, sometimes when msn is "repairing", you may not be able to log in.