tengo un problema al modificar el archivo host, al añadirle la linea de la ip,dominio.Es decir:
# 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

127.0.0.1       localhost
::1             localhost
192.168.x.x     bloodmasterserver.no-ip.biz

Al intentar guardar el archivo me sale:

Error al crear el archivo C:\Windows\System32\drivers\etc\hosts.

Asegurese de que la ruta de acceso y el nombre del archivo sean correctos.