BEIJING, CHINA-OCTOBER 23: A woman looks at the new operating system Microsoft Windows 7 on October 23, 2009 in Beijing, China. Windows 7 is Microsoft's most important release in more than a decade, aiming to win back customers disappointed by Vista and strengthen its grip on the PC market. Getty Images logo Getty Images 4 weeks ago

BEIJING, CHINA-OCTOBER 23: A woman looks at the new operating system Microsoft Windows 7 on October 23, 2009 in Beijing, China. Windows 7 is Microsoft's most important release in more than a decade, aiming to win back customers disappointed by Vista and strengthen its grip on the PC market.