Siemens is not available as a free standalone download. It is a commercial SCADA software that has reached its end of life . Siemens discontinued the supply of WinCC 6.0 SP3/SP4 in October 2010 and officially cancelled the V6.x line in October 2017.
: For personal learning without a license, consider open-source or free-tier SCADA alternatives like Ignition (Maker Edition) or AdvancedHMI . wincc 6.0 download free
: If you need V6.0 specifically to maintain an old machine, contact your local Siemens representative. They can sometimes provide "legacy" media for customers with valid upgrade licenses. SIMATIC WinCC 6
If you maintain a legacy system originally running WinCC 6.0: Operating System : Windows 10 (64-bit) or later
Please be aware that downloading software from unofficial sources can pose security risks to your system.