Why can open the restricted site

Interner option in there to have a safe, some website enter restricted site, where, why is it still open? Again enter the site, where privacy, according to the refusal, following the box shows “always stop”, but also To open the site to stop those who, in the end this is a different matter how
how to stop those sites

Netcom are loaded Constrained! ! However, I reload the system is not limited by it! I asked that
Netcom staff, he said all right! ! In the C:\ WINDOWS \ system32 \ drivers \ etc, there is a hosts file ..it with Notepad to open
to shield a Web site such as:7788.com on the hosts in the document by adding
127.0.0.1 7788.com
will be able to shield the site
was not clear if the hosts entry in the Encyclopedia see ..