How to Block a certain website in your computer

 
Go to Start and then Run.
    Type in this C:\WINDOWS\system32\drivers\etc
    Now you will see file name Host open that in Notepad.
    Below "127.0.0.1 localhost" add IP address of site to be blocked.

    To unblock any site just reversed the process.
   

      EXAMPLE



     127.0.0.1 localhost

     69.171.224.14    (This will block Facebook)

     NOTE: For each site you block just add "1" to the IP (127.0.0.1)