U.S. agencies cyber attacked via China

The Washington Post and CNN are reporting hackers are heavily using computers located in China to target the networks of U.S. agencies and U.S. analysts are divided about if the attacks are the work of the Chinese government, or the work of others located outside China, who are using Chinese computers to disguise the origins of the attacks.

I wonder if this activity is the result of thousands, if not millions, of pirated and unpatched copies of infected Windows computers.