Windows 10 Pro/Enterprise (64-bit), Windows Server 2012/2016 R2. RAM: Minimum 8GB recommended for comfortable operation.
LAD (Ladder Logic), FBD (Function Block Diagram), and STL (Statement List).
The safest method to get SP2 is directly from the portal. Siemens routinely publishes Trial versions and Service Packs for registered users. Visit the official SIOS portal. Search for "Step 7 V5.6 SP2 Download".
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Download the necessary installation files (setup.zip). Extract and Run: Extract the ZIP file and run Setup.exe .