Because Siemens frequently releases "Updates" (e.g., Update 1, Update 2) that add support for newer Windows builds, follow these steps: Access the Siemens Compatibility Tool "SIMATIC WinCC" as the main product. Choose version "V7.5 SP2" Add your target Operating System
Fully compatible with STEP 7 V5.6 HFx/SP2 and later. wincc 75 sp2 compatibility list best