It looks like the VLK version of Windows XP Pro x64 leaked a few days ago on Bittorrent sites and Usenet. Originally, the VLK version was leaked without any CD keys. But, as of today, CD keys were leaked onto the Internet. With these CD keys, the activation is bypassed (also known as the "corporate" version). The infamous "Corpfiles" has also been released. The files in "Corpfiles" converts OEM versions of Win XP x64 to corporate version.

Neowin's Forum

Please don't post links or downloads or I'll have to delete this article!