How To block websites...

To block websites:
try this for lock any website in ur pc.
go to run
type this below path

C:\WINDOWS\system32\drivers\etc

press enter...
you will find a file named HOSTS
right click menu select Open with
notepad.
Now,in the file under the line 127.0.0.1 localhost.
add another line as 127.0.0.2 www.xyz.com
Now,go to File
>> Save!
Now,www.xyz.com is not open
To unblock just do opposite !