: If you must stay on a modern host OS, consider upgrading to STEP 7 V5.6 or V5.7 , which officially support Windows 10. Critical Pre-Installation Checklist
Instead of fighting old STEP 7 V5.5:
: Standard versions of STEP 7 V5.5 are not officially released for Windows 10. simatic step 7 v5 5 sp2 download fixed work
: Real-time scanners often flag setup scripts as suspicious. Administrator Rights : Always run the by right-clicking and selecting "Run as Administrator" Drive Selection : If you must stay on a modern