Wow didn't expect this. Microsoft officially acknowledged the Nanami OS-Tan as the OS-Tan of Windows 7 and bought her rights. Then they got Nana Mizuki to voice her. The result is the advertisement you see here...
Sometimes I think MS Japan is on another planet than MS USA. "360 IS FAILING WHAT CAN WE DO!?" "PUT MORE EROGE AND OTAKU GAMES ON IT!" "ROGER!"