If you have the original media and are attempting to install it, keep in mind its very specific, older hardware and software requirements: Operating Systems
Finding a "free" download for Siemens SIMATIC WinCC 6.0 is complicated because it is proprietary commercial software and an legacy version that has been largely phased out. Official and Legal Status Not Freeware : Siemens WinCC is licensed software and is not available for free as a full version. Legacy Version wincc 6.0 download free
: WinCC V6.0 was released in 2003 and has since been replaced by newer versions like V7.x and SIMATIC WinCC V8 Updates and Service Packs If you have the original media and are
portal, but these require an existing license number to use. System Requirements (V6.0) System Requirements (V6
: Minimum Intel Pentium II 300 MHz (Client) or Pentium III 800 MHz (Server). : 256 MB (Client) to 512 MB (Server). : Microsoft SQL Server 2000 SP3. Modern Alternatives