We here on HTG don't condone any copyrighted links to be advertised. Now, if you have a product key and you have a legit copy of Windows then by all means get a "legal copy" but we won't help otherwise..
@powerajay, Examples of what you can get is in this link. These are not free and, the only free version is in oldgeezer post above. Whether you are able to buy from the link I posted in your country, I don't know. http://www.newegg.com/Product/.....Submit=ENE