Unlike public software, from a public, unsupported archive in most cases. The official downloads require:

Authorized users can sign into the Ivanti Success Portal and navigate to the Downloads tab to find the "Pulse Secure Desktop Client" installers.

Once you have secured the ps-pulse-win-9.1r15.0-b15819-64bit-installer.msi (or similar) file, follow these steps: For Windows: Double-click the .msi file.

Many universities and public institutions provide the MSI (Windows) or DMG (Mac) files on their public-facing IT help desks. If you use these, always verify the digital signature of the file after downloading. Step-by-Step Installation Guide