The method and system for limiting the number of installations of a computer software program located on a read only disk from the read only disk to a computer. The read only disk is linked to a removable read/write memory by data on the removable read/write memory corresponding to data on the read only...http://www.google.com/patents/US6226747?utm_source=gb-gplus-sharePatent US6226747 - Method for preventing software piracy during installation from a read only storage medium
