Block Or Unblock Websites without software ! ~ !!!! FACELESS !!!!

Many times in schools, colleges & offices surfing some sites like orkut,etc are banned !To overcome this you can unblock these or block some other websites and play pranks !Do The Following :For eg you want to block www.xyz.com !* Open the folder C:\WINDOWS\system32\drivers\etc* There you will find a file named HOSTS* Click on the file and press SHIFT and now right click on it .* From the right