[quote=clykie]though i havn't got an original software like vista but i can still get product key the website... some sites are giving free genuine serial and product keys in any kinds of softwares....[/quote] r u sure its genuine? coz i did that before and when i updated my windows i cant login automatically in my desktop and it says that your product key is not genuine...... those sites uses a software that decrypts the encrypted password inside the software and i think they uses a stream or block cypher decryption.