Block any Website you want, without any Software

If you want any website to be blocked from browsing in your PC, this can be easily done without using any software. Just follow these steps.
a). Browse C:\WINDOWS\system32\drivers\etc
b). Find and open the file named “hosts” in notepad (Right click-Open with-Notepad)
c). There you will see a line “127.0.0.1 localhost”
d). Just under this line add “127.0.0.1
www.sitenameuwanttoblock.com” , without quotes.(Replace the required site name)
You can add any number of sites like this. Save the changes and the mentioned site will no longer be accessible.
In case of reverting to original status, delete the additional entries made and save it.

Courtesy : http://doputtur.blogspot.com/