Перейди в папку C:\windows\system32\drivers\etc\. Найдёшь файл hosts, открой его с помощью Блокнота. Там должен быть такой текст:
Код:
## Copyright (c) 1993-2006 Microsoft Corp.
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows. #
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space. #
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol. #
# For example: #
# 102.54.94.97 rhino.acme.com
# source server
# 38.25.63.10 x.acme.com
# x client host
# localhost name resolution is handle within DNS itself.
# 127.0.0.1 localhost # ::1 localhost
После localhost ничего не должно быть.