Changing your hosts file in Vista

C:\Windows\System32\drivers\etc
+ hosts

Properties | Security | Edit

# 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
173.252.110.27 facebook.com
69.171.247.29 www.facebook.com
173.252.100.27 login.facebook.com
66.220.152.19 upload.facebook.com
66.220.152.19 graph.facebook.com
173.252.100.27 pixel.facebook.com
173.252.112.23 apps.facebook.com