How to block unblock websites ?

How to block unblock websites ?

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)