good day all,
i have been experiencing a weird behavior for quite sometime now, i am unable to visit some websites(mainly microsoft.com) on my OS(Windows XP Professional SP2).

however, i have no problem visiting other websites.

it keeps telling me website cannot be found, at first i thought it has to do with my web browser(FF3), but then i realized its the same result with other browsers(Opera, IE7, Safari, even Chrome).

what do u think can be responsible for this?