The primary reason users seek "fixed" download solutions is that Siemens has officially discontinued TIA Portal V12 and removed direct public downloads from their support website. As stated on Siemens' download pages, "V12 is discontinued, and the download is therefore no longer possible". This creates a challenging situation for automation engineers who need this specific version for legacy project maintenance.
Click and point the browser to your downloaded .isp12 Hardware Support Package files. Tia Portal V12 Sp1 Download Fixed
The safest and most reliable place for Siemens software is the portal. While direct download links can change, here is the pathway to finding the files: The primary reason users seek "fixed" download solutions