Shoutbox

Try takeing a look in your hosts file.

Click Start
Click Search (or Find for 98 and older)
Search for hosts
Open up the hosts file in the system32 folder with notepad
Check to see if the file looks like this:

# Copyright (c) 1993-1999 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
127.0.0.1       localhost


for more info on the hosts file go to:
http://accs-net.com/hosts/what_is_hosts.html