The official download for SIMATIC WinCC V6.2 Service Pack 3 (SP3) is available through the Siemens Industry Online Support (SIOS) portal
Using WinCC V6.2 SP3 offers several benefits, including: wincc v6.2 sp3 download
Intel Pentium 4, 2.0 GHz or higher (Recommended). The official download for SIMATIC WinCC V6
Even though it is legacy, if your company had an active Siemens Software Update Service (SUS) contract back in 2008-2015, you might still have access. including: Intel Pentium 4
You can request legacy software media directly through your local Siemens Industry Automation representative or via the Siemens Industry Online Support (SIOS) portal if you hold a valid software contract.