edit: I'm doing the Microsoft Security Essentials scan right now... it's gonna take a while (currently found 3 potential threats).
C:\Windows\System32\drivers\etc\hosts
open it with notepad or wordpad and paste it here
# copyright (c) 1993-2009 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 handled within dns itself.
# 127.0.0.1 localhost
# ::1 localhost
255.255.255.255 easyanticheat.se # misleading site
255.255.255.255
www.easyanticheat.se # misleading site
255.255.255.255 easyanticheat.com # misleading site
255.255.255.255
www.easyanticheat.com # misleading site
255.255.255.255 easyanticheat.org # misleading site
255.255.255.255
www.easyanticheat.org # misleading site