Softpedia reports a crack for the Ultimate Edition of Windows 7 is already available on the Internet. Reports indicate a leaked Windows 7 Ultimate OEM DVD ISO from Lenovo made the hack possible:
Reports from various forums and websites (which I will not link to because they offer the proof-of-concept of the Windows 7 RTM Ultimate crack, along with the activation product key, which is illegal) indicate that the cracked client can bypass Windows genuine Advantage validation with no problems whatsoever. A Windows 7 Ultimate OEM DVD ISO from Lenovo has reportedly made the hack possible. Leaked on a Chinese forum, complete with the download links, the ISO allowed for hackers to grab the OEM-SLP (System-Locked Preinstallation) product key as well as the OEM certificate for Windows 7 RTM Ultimate via boot.wim.
The bypass designed for Windows 7 RTM involves abusing OEM activation 2.1, and in this regard the circumventing process is nothing more than an OEM hack.