If you are starting a new project, consider using TIA Portal WinCC Advanced/Professional , as WinCC flexible is considered "End of Life" and receives no further security updates or features.
: Click on the download link to start the download process.
To ensure a stable installation, your PC should meet these minimum specifications: Windows 7 or Windows 10 (64-bit). Processor: Pentium IV 1.6 GHz (Core 2 Duo recommended). RAM: Minimum 1.5 GB (2 GB recommended). Storage: At least 3 GB of free hard disk space.