The release-to-manufacturing version of Windows 7 has been cracked according to various tech sites.

Crackers obtained a copy of the disc that contain Windows 7 Ultimate OEM version from Lenovo. Then, they were able to extract the system-locked pre-installation product key and the OEM certificate.

After getting those information, they tweaked the values found in the Software Licensing Description Table.

This is not just exclusive to the Lenovo brand. Dell, HP, and MSI are the other brands that can be cracked as well.

Source: PCWorld