Brief High Level Summary:
The requirement is for a stand-alone command line based executable that can be run under a functioning 32 or 64 bit Windows operating system (Windows XP and Vista) that resets the master boot record on the local machine that the program is run on without presenting any user interaction (silent functionality). The program does not have to format the disk, delete any data or any pre-conditional checking as such, it just needs to reset the MBR in order to ensure that the machine cannot boot to any disks upon reboot.
The application will require some basic return codes related to failure / success.