How do i block and unblock internet sites

Procedure to block an unblock internet sites:

• Go to Start and type RUN .
• Type C:\WINDOWS\system32\drivers\etc
• Open the file "HOSTS" in a notepad
• Under "127.0.0.1 localhost" . Add IP Name
  IP - IP of the site to be blocked
  Name - Name of the site (see the pic below for example

Example :
127.0.0.1 localhost
210.210.19.82 www.sifymall.com

Sifymall is now unaccessable . For every site after that you want block , just add "1" to the last number in the internal ip (127.0.0.2) and then the add like before.