: Licensed users can download the full software package and license keys directly via the Siemens OSD platform System Requirements for V7.4

Run the setup file as an Administrator.

Downloading SIMATIC WinCC V7.4 SP1/SP2 for "free" is primarily available as an upgrade for existing license holders rather than a standalone free product. While Siemens provides the service pack files on their official support site, installing and running the software in a production capacity requires a valid license to avoid restricted "demo mode". Official Download & Upgrade Options