The present invention provides an image processing apparatus comprising detecting alteration of any application held in the image processing apparatus; determining, in a case where alteration has been detected, whether or not the use of the image processing apparatus needs to be restricted based on the application in which alteration has been detected; and displaying, in a display unit and as a result of the determination, in a case where the use of the image processing apparatus needs to be restricted, a message indicating that alteration of the application has been detected, and restricting the use of the image processing apparatus, and in a case where the use of the image processing apparatus need not be restricted, display, in the display unit, a message indicating that alteration of the application has been detected.