SecuROM

SecuROM is a CD/DVD copy protection solution, most often used for Computer games, by Sony DADC. SecuROM aims to resist home media duplication devices, professional duplicators, and reverse engineering attempts. The newest versions (v4 and up) prevent 1:1 CD-R copies from being made. Certain programs can circumvent its protection, but can't duplicate it. While the use of SecuROM is not regarded as controversial as some other copy protection schemes, it has been known to cause problems. It installs a shell extension that, for example, prevents Windows Explorer from deleting 16-bit executables