There is provided a non-transitory storage medium that stores a secure printing set-up program executable on an image processing device connectable to an image forming device. The secure printing set-up program includes a set of program instructions including: obtaining other user information indicative of whether there is any other user that is able to use the image forming device; and installing a driver with such a default setting that the image forming device operates in either one of a secure mode and a normal mode, the secure mode being such that the image forming device forms images when a user of the information processing device is authenticated, the normal mode being such that the image forming device forms images without authenticating the user of the information processing device, the default setting being configured to be selected between the secure mode and the normal mode depending on the other user information.