- 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.
 
     127.0.0.1 localhost
69.171.224.14 (This will block Facebook)
69.171.224.14 (This will block Facebook)
     NOTE: For each site you block just add "1" to the IP (127.0.0.1)
