Electric equipment, and a method and a program for preventing the unauthorized use of same, by which it is possible to prevent the theft of electric equipment installed in an environment where the electric equipment is available for the use of an unspecified number of users and the stealing of information stored in the electric equipment. The sensor substrate is configured to be capable of performing photoelectric conversion. The data storage medium can be switched into a test mode in which the test signals are used for the test. A controller causes the first warm air mechanism to blow warm air to the side face of the sheet stack and causes the elevator to displace the sheet carrying plate between the sheet feeding position and the separating position. The carrier is composed of an inert, refractory solid support such as alpha alumina and has a surface exhibiting a plurality of nanometer scale protrusions projecting outwardly from the surface, and has a catalytically effective amount of silver thereon.