This is an installation program for Sysinternals Suite. It creates a Start menu group and shortcuts for all the utilities included in Sysinternals Suite. The installer does not include Sysinternals Suite; it has to be downloaded separately. Once the Sysinternals Suite zip file has been downloaded and uncompressed, you can place the installer in the folder containing the utilities, and run it from there.
The installer also installs an uninstallation program, which allows you to remove Sysinternals Suite later on if desired. The source code for the installation script is also avaialable, and can be downloaded from the Domador Software website. (Domador Software is not affiliated with Sysinternals or Microsoft.)