Siemens typically provides software downloads through their portal.
Several automation forums and community websites have attempted to preserve access to older versions. For example, the PLCJS forum has shared Baidu cloud links for TIA Portal V12, and other forums have offered downloads for STEP7 Professional V12 SP1. download tia portal v12 sp1 top
Go to the official Siemens Industry Online Support website and submit a formal Support Request . In your request, clearly explain your situation: you have a legal license but require the installation media for TIA Portal V12 SP1 because you need to maintain a project created with that specific version. Go to the official Siemens Industry Online Support
Place all downloaded parts into a single, dedicated folder on your local drive ( C:\Siemens_Downloads ). Do not attempt to run files from a network share. Do not attempt to run files from a network share