1. A program for causing a computer to protect from illegally copying the program, said program comprising the codes for: conducting a first reproducing process for reproducing data in a special area of a recording medium recording said program by conducting an error correction when said program is activated; conducting a first determining process for determining whether or not a reproduction error for which the error correction cannot be conducted occurs during said first reproducing process; conducting a second reproducing process for reproducing the data in the special area without conducting the error correction when the reproduction error did not occur as a result of said first determining process; conducting a second determining process for determining whether or not a predetermined pattern is reproduced by said second reproducing process; and conducting a permitting process for permitting a process corresponding to a given command when the predetermined pattern is reproduced as a result of said second determining process.