It aims to provide a software installing method which can automatically perform appropriate link setup even when second software is installed after first software was installed, and a storage medium which stores the installed software. To do so, there are provided a first installation step of installing the first software, a second installation step of installing the second software, a first link setup step of performing link setup of the second software already installed, when the installation of the first software in the first installation step ends, and a second link setup step of performing link setup of the second software installed in the second installation step, when the installation of the second software ends.