I m waiting for a long time to write something here...
but finally i got that i have to write how to block a particular website in your computer and how to access blocked website from your computer
This is for block a website in your computer
There is a few step which u have to follow in order to the block the website
Make sure about that you really want to block a website and ya if you then you have to know domain name of that website like "www.facebook.com" ........... (:D))
Now you have to open your System Drive in your computer
If Your System is in drive C:\
then Go to this Path in your computer
There is a file called "hosts"
Open this file in your text editor(You can use your favorite one 'Notepad' :))
As shown in image after a localhost add your link which you want to block with the same IP address
Now Save this file in Any Other place and replace with d original one
Now you can able to see that Facebook is blocked in your computer
so, your friend can't able to use your laptop for Facebook although you give him...
Ya Don't Forget to close all d Folders Which is Open in your Explorer
Credits : Hack the universe