I´m having some problems doing this using hosts files and nework configuration. What I need. Stop All internet Allow only one site accessible. If possible Windows Updates and AV updates (Microsoft AV) I found this method. Configur IP manualy outside the range of the router, router goes fro 188.8.131.52 to 192.168.200.50, and setting manuali at .55 for example. letting DNS in blank, it stoped all internet. And edit hosts to enable the website I need. I think its easier to stop everething than block the bad ones.