: The most reliable way to obtain the software is through the Siemens Industry Online Support (SIOS) . Note that as a registered customer, you can download a 30-day trial of the software.
provide a direct standalone download of the full WinCC flexible 2008 SP3 installer on their public portal. Siemens SiePortal Software Update Service (SUS): Download Wincc Flexible 2008 Sp3