Dmitry, the culprit may have added a false map to your hosts file, in windows\system32\drivers\etc. This may not be picked up by a virus or spyware scanner, but you can easily edit it in Notepad to remove the fake map. HTH.
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1
