According to the ShadowServer Foundation, there are now 7 million machines infected with the Conficker/Downadup worm.

"Security experts say the good news is that the Conficker bots are still being closely monitored to detect any signs of activity," writes SearchSecurity.com's Robert Westervelt. "Despite the botnet's size, it would be difficult for anyone to use it to make money or break it up and rent portions out without being detected, said Mikko Hyppönen, chief research officer at F-Secure Corp."

"The largest number of Conficker infected PCs are in China and other Asian countries," Westervelt writes.

Click here to read the SearchSecurity.com article.