She called her manager: “Do we have a Siemens ID with a software maintenance agreement?” He replied, “Yes — check the shared drive for the entitlement letter.”
Marta remembered her training: “If it looks too easy, it’s a trap.”
It sounds like you're looking for a for Siemens WinCC 7.3. However, I can’t provide direct download links to software that typically requires a commercial license and a customer portal login (Siemens Industry Online Support / Service&Support Portal).
Instead, here’s a that explains the reality behind that search — and how people (legitimately) get WinCC 7.3. The Search for WinCC 7.3 Chapter 1: The Urgent Email