Officially, Siemens largely bypassed Windows 8 in its lifecycle documentation, transitioning classic software support straight from Windows 7 to Windows 10 Pro/Enterprise.
Comprehensive Guide: Download SIMATIC Manager STEP 7 for Windows 8
Siemens enforces strict system requirements for its engineering tools. If you use a version of STEP 7 that is not explicitly built for your exact operating system version, the installation routine will block you with a fatal OS compatibility warning.
This version is not natively supported on Windows 8 or Windows 8.1 . It was built for Windows XP and Windows 7.
