If your company has a valid Siemens software service agreement, you might still access old versions (including WinCC 6.0 SP3+) through the .
For those looking to learn or test the software without the risk of "free" downloads: Trial Versions: wincc 6.0 download free
Using unlicensed software in a commercial environment violates EULA terms and can lead to heavy fines during audits. Compatibility Hurdles WinCC 6.0 was designed for Windows 2000 Windows XP If your company has a valid Siemens software