Here is a simple trick we will Block a webpage without any software !!!!
so easy and simple! just follow these steps
Lets block Facebook!!!
1) Open Notepad its important to run it as Administrator
Start -> All Programs -> Accessories -> Notepad (Run as administrator)
(this will block Facebook , yahoo and Google but you can write any site you want)
3) Save it in to the below address as "hosts"
select "all files *.* " from Save as type part (as in below picture)
(Do same as show in red parts of picture )
Confirm the dialog box
its done now try to open facebook!!!!!
you can't ! its blocked
to Unblock :
It is same as blocking!
but in this time save a blank file or delete the site you want to unblock it from the Hosts file