I've read nearly one year ago that RIAA had created a fabulous and infalible method for protecting audio CDs, so problably DMR CDs are being sold for many monthes and not only by Sony, it will explain the huge number of computers contaminated all over the world. The number of infected CDs is not only due the CDs purchased, you must included all the copies burned in home and distributed. 1- The virus software allows you to make three copies, each owner of a copy can create another three copies (not in the same PC) and so on. 2- The fabulous and infalible protection doesn't work in Linux, Mac, the most used Windows 98, Windows NT and probably Windows 2000. So people were copying and distributing infected CDs without knowing about the presence of the virus. The case of DMR only exploded and come to public when some person (Sysinternals) discovered the existence of the virus and make it public.

Stupidity also evolves!